Kaeng Khiao Wan

Thai green curry with round green Thai eggplant and chicken in fragrant coconut milk with kaffir lime, lemongrass, and Thai basil

Origin: Central Thailand

From the journey of Eggplant / Aubergine.

Thailand's relationship with eggplant is unique in world cooking: no other cuisine has developed as many distinct eggplant varieties for as many specific culinary purposes. The round green Thai eggplant (ma-kheua pro, มะเขือเปราะ), roughly the size of a golf ball, pale green to cream-streaked, and slightly bitter with a firm flesh that holds its shape in liquid, is the central eggplant of the Thai curry tradition. The tiny pea eggplant (ma-kheua puang, มะเขือพวง), no larger than a large pea, is used whole in curries for its sharp, bitter pop against the rich coconut milk. The long purple eggplant (ma-kheua yao, มะเขือยาว) is reserved for stir-fries and grills. This diversity of variety matched to technique reflects a culinary culture that has been working with eggplant for over a thousand years, since Indian Ocean trade carried the plant northward through the Malay Peninsula into the Chao Phraya Basin during the Dvaravati Kingdom period. Kaeng khiao wan (literally 'sweet green curry') is one of the three great Thai curries alongside red (kaeng phet) and yellow (kaeng kari). The green curry paste is made from fresh green chillies, lemongrass, galangal, kaffir lime zest, coriander root, garlic, shallots, and shrimp paste, producing a deeply fragrant base that is simultaneously herbaceous, citrus-bright, and layered with fermented savour. Round Thai eggplant is the canonical vegetable: it absorbs the coconut milk beautifully while the slight bitterness of the skin provides a counterpoint to the richness of the sauce. Thai basil (horapa, with its anise-sweet fragrance distinct from Italian basil) and kaffir lime leaves are the finishing aromatics; neither is optional. The dish belongs to the royal Thai culinary tradition that codified the great curry preparations in the Bangkok period, though its roots in the spiced coconut broths of the Ayutthaya Kingdom go back several centuries further.

Ingredients

Curry

  • 2 tbsp coconut oil or vegetable oil
  • 4 tbsp Thai green curry paste (ready-made, such as Maesri or Mae Ploy brand; see notes for homemade)
  • 400 ml full-fat coconut milk (do not shake the can before opening)
  • 200 ml chicken stock or water

Protein

  • 400 g boneless skinless chicken thighs, cut into 3 cm pieces

Vegetables

  • 350 g round green Thai eggplant (ma-kheua pro), quartered (or regular eggplant, cut into 3 cm chunks)
  • 80 g pea eggplants (ma-kheua puang, optional but traditional)

Aromatics

  • 4 kaffir lime leaves, central rib removed and leaves torn

Seasoning

  • 2 tbsp fish sauce
  • 1 tsp palm sugar or light brown sugar

To Finish

  • 1 large handful Thai basil leaves (horapa), stems removed
  • 2 red chillies, thinly sliced, to garnish

To Serve

  • steamed jasmine rice, to serve

Method

  1. Open the coconut milk without shaking and spoon the thick cream from the top of the can into a measuring jug (about 100 to 120 ml). Set the remaining thinner coconut liquid aside.
  2. Heat the oil in a wide, deep pan or wok over medium-high heat. Add the green curry paste and fry, stirring constantly, for 2 to 3 minutes until intensely fragrant and the paste has separated slightly from the oil.
  3. Add the thick coconut cream. Stir to combine with the paste and cook for 3 to 4 minutes, stirring frequently, until the mixture is bubbling and the coconut fat has separated and shimmers on the surface.
  4. Add the chicken pieces. Toss to coat thoroughly in the paste and cook for 3 to 4 minutes, turning occasionally, until the chicken has lost its raw pink colour on the outside.
  5. Pour in the remaining coconut liquid and the chicken stock. Add the round Thai eggplant, pea eggplants (if using), and kaffir lime leaves. Bring to a gentle simmer.
  6. Simmer uncovered for 12 to 15 minutes until the chicken is cooked through and the eggplant is tender but still holding its shape. The round Thai eggplant should be completely soft when pressed but not disintegrating.
  7. Season with fish sauce and palm sugar. Taste and adjust: the curry should be rich, fragrant, and balanced between the heat of the paste, the sweetness of the coconut, and the salt of the fish sauce.
  8. Remove from heat. Stir in the Thai basil leaves. Serve immediately in deep bowls with steamed jasmine rice, garnished with sliced red chilli.

Notes

Round green Thai eggplant (ma-kheua pro) is available from Thai and Southeast Asian grocery stores. If unavailable, regular purple eggplant cut into 3 cm chunks is a workable substitute, though it lacks the characteristic slight bitterness and firmer texture. Pea eggplants are highly seasonal outside of Thailand and may be difficult to source; their contribution is textural and mildly bitter, and the curry is complete without them. For a vegetarian version, substitute the chicken with firm tofu (pressed and cubed) and replace the fish sauce with light soy sauce or a vegetarian fish sauce; use vegetable stock. Homemade green curry paste requires lemongrass, galangal, fresh green chillies, garlic, shallots, kaffir lime zest, coriander root, cumin, white pepper, and shrimp paste pounded together in a mortar; it is significantly more aromatic than the ready-made version but requires 20 minutes of additional preparation.

The Gastrographer

The Gastrographer

Mapping Culinary History

To explore — select an ingredient below.

Journey Point Map Key

Ingredient originTrade or transit route
Became a culinary stapleColonial / trade control
c. 1870 CE
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1870 CE
2500 BCE500 CE900 CE1870 CE
Eggplant / Aubergine

Eggplant / Aubergine

Solanum melongena

VegetablesNightshade Family (Solanaceae)

🌍Origin

Deccan Plateau & Western Ghats, South India — c. 2500 BCE

🌱Domestication

The eggplant is the one great vegetable of the nightshade family, the Solanaceae, to have come not from the Americas but from the Old World, and it stands quite alone amongst its relatives in this respect. Whilst the tomato, the potato, the chilli, and the sweet pepper all crossed the Atlantic eastward after 1492, Solanum melongena was already an ancient cultivated plant of monsoon Asia, domesticated from its wild and thorny ancestor Solanum insanum in the Indian subcontinent, most probably in the broad belt encompassing modern Karnataka, Maharashtra, and Gujarat that spans the Deccan Plateau and the Western Ghats. Archaeological and textual evidence places its cultivation firmly in South Asia by at least 2500 BCE, and the oldest Sanskrit names for the plant, amongst them vatinganah, confirm that early Indian farmers had already taken the small, bitter, hard-fruited wild species and, through patient selection, begun to coax from it the swollen, glossy, low-seeded fruit we know. That selection was extraordinarily fertile. From the single domesticated species an astonishing range of cultivated forms diverged across Asia: the long, slender, lavender Asian aubergines of the Chinese and Japanese kitchen; the small, round, green, and white Thai varieties bred for curries; the squat, deep-purple globe of the Mediterranean; the tiny, bitter pea aubergines of Southeast Asia; and the little white, egg-shaped sorts that gave the plant its English name. No other Old World vegetable shows such variety of shape, size, and colour, and that diversity records the antiquity and the geographical breadth of the plant's cultivation under human hands. The eggplant's defining culinary virtue lies in its spongy, fat-loving flesh. The raw fruit is dense, pale, and unpromising, faintly bitter, with a texture that can be unpleasant; but when it meets heat and oil it is transformed utterly, the open cellular structure drinking in fat, smoke, and seasoning and collapsing into something silky, unctuous, and deeply savoury. This generosity, the willingness to absorb whatever flavour it is given and to carry smoke and richness better than almost any other vegetable, is the quality that made it indispensable to the cooks of three continents. S. melongena belongs to the same botanical family as deadly nightshade and mandrake, the Solanaceae, and that kinship dogged it for centuries in the European imagination, where it was long held to be a maddening, even poisonous fruit; yet across Asia and the Islamic world no such suspicion attached to it, and there it became one of the most honoured of all vegetables, the canvas for some of the most sophisticated cooking in the world.

Global Voyage

From its South Asian cradle the eggplant travelled outward along the great trade arteries of the ancient and medieval world, carried not as a single wave but along several distinct corridors that between them spread the plant, and its Sanskrit-rooted name, across most of the inhabited earth. The first and most consequential corridor ran westward overland. From northern India the plant moved through the Khyber Pass into Afghanistan, the meeting ground of Indian, Persian, and Central Asian cooking, and on to the Persian plateau, where it reached the Sassanid Empire by the sixth century CE. The Persian word badinjan, descended directly from the Sanskrit vatinganah, became the linguistic seed from which almost every Western name for the vegetable would later grow, passing into Arabic as al-badinjan and thence into the Romance tongues. It was the Arab expansion and the Islamic Golden Age that carried the eggplant decisively into the Mediterranean. Arab agronomists and merchants, who prized the vegetable above almost all others, planted it across North Africa, in Al-Andalus, and in Sicily by the tenth century CE; the tenth-century Baghdad cookery book of Ibn Sayyar al-Warraq, the Kitab al-Tabikh, records thirteen distinct eggplant preparations, a measure of how central the plant had already become to the cooking of the Abbasid court. From Damascus and Baghdad the eggplant entered the kitchens of the Levant, where charring and mashing it with tahini and lemon produced baba ganoush; from Fez it entered the Moroccan cooked-salad tradition as zaalouk; and from the Emirate of Sicily it slipped into Italy, giving the Italian melanzana and, in time, the parmigiana di melanzane. A second corridor ran eastward. Along the Silk Road the eggplant reached China by the fifth century CE, where it became qiezi and, in the hands of Sichuanese cooks, the celebrated yu xiang qiezi; from China it passed to Japan during the Nara period to become nasu, hedged about with proverb and ceremony. A third corridor was maritime, the Indian Ocean and the Strait of Malacca, along which Tamil and later Srivijayan traders carried the plant to Sumatra, Java, the Malay Peninsula, and Thailand, where it became terong, terung, and ma-kheua, the structural heart of dishes from terong balado to kaeng khiao wan. The same Indian Ocean dhow routes that bore pepper and cardamom from Malabar carried the eggplant, through the great relay port of Aden, down the Swahili Coast to Zanzibar, where it became bilingani in a coconut curry that was at once Arab, Indian, and African. The Ottoman Empire then gathered up the whole Mediterranean and Arab inheritance and refined it into an imperial cuisine: the palace kitchens at Topkapi are said to have developed dozens of eggplant dishes, amongst them imam bayildi, and Ottoman influence carried these preparations across the Balkans and into Greece, where they were absorbed so completely that moussaka and melitzanosalata became Greek to the core. The plant reached the Americas with European colonisers in the sixteenth century, but its most poignant transatlantic crossings came later and by harder roads: enslaved and indentured peoples carried it with them, the Cape Malay communities transported to Table Mountain by the Dutch East India Company making it brinjal sambal, and Indian indentured labourers carrying the technique of flame-charring across the ocean to Trinidad, where baigan choka closed the circle and returned the eggplant, transformed yet unmistakably Indian at heart, to the New World.

🍽Modern Culinary Role

The eggplant is today one of the most widely cultivated and most versatile vegetables on earth, a cornerstone of cuisines that stretch in an unbroken band from Japan to Morocco and from the Caucasus to the Caribbean. Its singular culinary gift is its capacity to absorb: it drinks in fat, smoke, and seasoning with a generosity no other vegetable matches, and under heat its spongy raw flesh collapses into a silky, savoury, almost meaty richness that has made it, in many traditions, the favoured vegetable of those who eat little or no meat. That quality has given rise to an exceptional diversity of technique, for the eggplant is cooked in almost every way a vegetable can be: charred whole over flame and mashed, as in baba ganoush, baingan bharta, and baigan choka; sliced and fried then layered, as in parmigiana di melanzane and moussaka; braised slowly in oil until it dissolves, as in imam bayildi, zaalouk, and ratatouille; stir-fried with chilli and fermented bean, as in yu xiang qiezi; glazed with sweet miso, as in nasu dengaku; or stewed in coconut milk, as in the curries of the Swahili Coast and Thailand. That geographical reach is matched by a depth of cultural meaning few vegetables carry. In Bengal the eggplant sits on a pedestal of culinary affection; in Japan it appears in the New Year proverb that ranks it amongst the three most auspicious dream images; across the Arab and Mediterranean world it is the subject of more named, codified, and beloved dishes than almost any other plant. Its journey is also one of the most legible in all of food history, for the doubled naming of the vegetable, badinjan and its descendants flowing west out of Sanskrit, terong and brinjal flowing along the maritime routes, traces on the tongue the very trade corridors the plant followed. From the green curry of Bangkok to the caponata of Palermo, the eggplant remains the great absorbent canvas of world cooking, the vegetable that takes the flavour of wherever it has landed and makes that place taste more fully of itself.

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