Step 1: Fry the bitter gourd (important)
Heat oil in a pan and fry chopped bitter gourd until it changes colour and turns slightly crisp.
Set aside. This step reduces bitterness.
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Step 2: Roast and grind masala
Heat 1 tsp oil and fry dried red chillies, channa dal, coriander seeds, urad dal, garlic, jeera, coconut and tamarind.
Grind into a smooth paste with little water.
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Step 3: Prepare the base
Heat oil in a pan. Add mustard seeds, jeera, fenugreek and curry leaves.
Add sliced onions and sauté until soft.
Add chopped tomato and cook until mushy.
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Step 4: Combine
Add fried bitter gourd and mix well.
Add the ground masala paste and required water.
Add salt and asafoetida. Mix well.
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Step 5: Cook and finish
Cover and cook until the kulambu thickens.
Add jaggery and simmer until oil separates on top.