Step 1: Dry roast 1 cup of horse gram in a pan for 10 min in slow flame and coarse grind the horse gram.
Step 2: Boil 2 cups of water and add the coarse powder of horse gram and simmer it for 10 mins and keep it aside.
Step 3: Rasam Powder: Grind 1 teaspoon of pepper, 1 teaspoon of cumin seeds, 1 red chili and 3 garlic pieces to coarse powder.
Step 4: Tamarind Juice: Soak the small lemon sized Tamarind in hot water for 5 min. Once it soaked prepare the tamarind extract with 250 ml of water.
Step 5: Smash 2 tomatoes, break 1 green chillie into 2 halves, 1/4 teaspoon of turmeric powder, 3 strings of coriander leaf, salt, and Rasam powder into the tamarind extract.
Step 6: Seasoning: In the pan add 2 teaspoon of oil, 1 red chili, 1/2 teaspoon of mustard seeds. Once it splutters add 2 pinches of hing and 1 string of curry leaves to it.
Step 7: Add the seasoning to the tamarind mixture. Let the mixture boils. Once u have seen the white bubbles in the mixture switch of the stove.
Step 8: Finally add the boiled horse gram to Rasam.
-Courtsey: Chennai Grill