Step 1: Dry Roast Horsegram and Toor Dal

In a heavy-bottomed pan, dry roast 1/2 cup horsegram (kollu) and 3 tablespoons toor dal without oil. Stir continuously until the toor dal turns deep brown. Transfer the roasted mixture to a plate and let it cool completely.

Step 2: Dry Roast Spices and Curry Leaves

In the same pan, dry roast 1/3 cup cumin seeds, 1/2 cup coriander seeds (dhaniya), 12 dried red chilies, 2 tablespoons black pepper, and 10-15 curry leaves. Stir continuously to prevent burning. Transfer the roasted spices to a separate plate and let them cool completely.

Step 3: Grind Rasam Powder (First Batch)

Once cooled, transfer the roasted horsegram, toor dal, and dried red chilies to a mixer grinder. Grind them coarsely in pulse mode. Be careful when opening the mixer jar due to the strong aroma of ground red chilies.

Step 4: Grind Rasam Powder (Second Batch)

Add the remaining roasted spices (cumin, coriander, black pepper, curry leaves) and 1 teaspoon turmeric powder to the mixer grinder with the first batch. Grind everything together in pulse mode until it reaches a slightly coarse texture. The rasam powder does not need to be finely ground.

Step 5: Store Rasam Powder

Transfer the prepared rasam powder to a plate and spread it out to cool completely. Once fully cooled, store it in an airtight container. This recipe yields approximately 230-250 grams of rasam powder.

Step 6: Prepare Rasam Base

In a heavy-bottomed vessel, add 2 teaspoons tamarind paste, 1.5 teaspoons salt, 10 curry leaves, 1 chopped tomato (approx. 3/4 cup), 1 tablespoon of the homemade kollu rasam podi, 3 crushed garlic cloves, 1/4 teaspoon turmeric powder, and 1/2 teaspoon freshly crushed black pepper.

Step 7: Combine and Mash

Add 2 cups of water to the vessel. Using your hands, thoroughly mash the tomatoes to release their juices and ensure all ingredients are well combined.

Step 8: Simmer Rasam (First Boil)

Turn on the heat and bring the rasam mixture to a boil. Once it starts boiling, add 2 tablespoons of chopped cilantro leaves and 5-8 more curry leaves. Simmer for a few minutes.

Step 9: Simmer Rasam (Second Boil)

Add 2 more cups of water to the rasam. Reduce the heat to low and bring the rasam to a gentle simmer. Do not bring it to a vigorous boil again. Turn off the heat when the rasam becomes frothy on top.

Step 10: Final Cilantro and Cover

Add 1 more tablespoon of chopped cilantro to the rasam. Close the lid of the vessel to allow the flavors to infuse.

Step 11: Prepare Tempering

In a small pan, heat 1 teaspoon of oil or ghee. Add 1/2 teaspoon mustard seeds and 1/2 teaspoon cumin seeds. Cook until the mustard seeds splutter.

Step 12: Add Tempering and Serve

Pour the prepared tempering over the rasam. Stir gently to combine. The flavorful Kollu Rasam is now ready to be enjoyed as a soup or with rice.

• Ensure continuous stirring while dry roasting spices to prevent burning.

• Allow all roasted ingredients to cool completely before grinding and storing.

• Be cautious when opening the mixer jar after grinding red chilies, as the aroma can be strong.

• For rasam, mash tomatoes well to incorporate their juices.

• Do not boil the rasam vigorously after adding cilantro and curry leaves; a gentle simmer is sufficient to infuse flavors.

• For a vegan version of rasam, use oil instead of ghee for tempering.

• The rasam powder can be used to make one-pot rasam rice.