Boil the yellow dal in a pressure cooker, mash it and keep aside. Heat 1 tsp of oil in a pan and saute all the dry ingredients for 2-3 mins.
Then, grind them together with some water making a paste. Keep aside. Cook the drumsticks with a pinch of turmeric powder in some water. Remove from fire when soft.
Heat 1 tsp of oil in a pan and saute the onions till they turn golden brown. Add tomato, ground masala and the powder ingredients with some water. Stir well.
Add the drumsticks, tur dal and the tamarind extract. Mix well. Add two cups of water and let it cook for 15-20 min on medium heat.
In another pan heat 2 tbsp oil and add all the seasoning ingredients. Let it simmer till they begin to crackle.
Then mix these seasoning ingredients in the sambar and serve hot.
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Key Ingredients: Pigeon pea, tomato, onion, tamarind, turmeric, salt, bengal gram (split), red chilli, desiccated coconut, fenugreek seeds, coriander seeds, vegetable oil, fenugreek, black gram, curry leaves