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1
Toast the coriander, cumin, and fennel seeds in a dry pan over medium heat until fragrant, then transfer to a mortar or blender. Combine with the shallots, garlic, chillies, ginger, turmeric, and galangal; grind or blend to a smooth, cohesive paste. The bumbu is ready when no coarse grain remains and the colour is a deep ochre-orange.
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2
Heat the oil in a heavy pot over medium heat. Add the bumbu and fry, stirring constantly, until the raw sharpness has cooked out and the paste begins to separate from the oil — the fat visibly pools at the edges of the mass. This is where the dish lives or dies: an undercooked bumbu will leave the curry flat and raw-tasting; a scorched one cannot be recovered.
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3
Add the goat pieces and turn them through the fried bumbu until every surface is coated and the meat has coloured to a deep gold at its edges.
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4
Pour in the coconut milk and water. Add the bruised lemongrass and torn kaffir lime leaves. Bring to a gentle simmer, then reduce the heat to low, cover partially, and cook until the goat is completely tender — the meat yields without resistance when pressed and begins to draw back from the bone.
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5
Uncover and allow the sauce to reduce until it thickens to a rich, coating consistency. Taste and adjust salt. The finished gulai is fragrant with warming spice, and the coconut sauce clings to the back of a spoon.