Pre-prep: First, gather all my ingredients. chop the mutton into small pieces and peel and slice the shallots. I also peel the garlic cloves and chop the tomato. Getting everything ready helps the cooking go smoothly. Rinse the curry leaves and coriander and keep them aside for later use.
Making the Masala Paste: Take the shallots, garlic, cumin seeds, and whole pepper and grind them together into a coarse paste. This paste is the heart of the rasam and gives it a great flavor boost. If it’s too dry while grinding, add a tiny splash of water just to help it blend.
Cooking the Mutton Stock: In a pressure cooker, add the chopped mutton, turmeric, salt, and 2 cups of water. After sealing the cooker, pressure cook it for 10 whistles and then let it simmer on low heat for another 10 minutes. After turning off the heat, let the pressure release naturally. This step makes the mutton tender and infuses the stock with rich flavors. Sometimes skim off any foam or excess fat from the top of the stock to keep the rasam clear and light.
Making the Rasam: Drain the cooked mutton and reserve the stock. While the meat can be used for another dish like mutton thoran, the stock becomes the base for the rasam. heat coconut oil in a pan and add the ground masala paste, sautéing it until the raw smell disappears. Then add chopped tomatoes and curry leaves and sauté them lightly. After this, add turmeric powder, chili powder, and salt, mixing everything well. Finally, pour in the mutton stock and bring it to a boil. Once boiling, turn off the heat and garnish with fresh coriander leaves. The rasam is ready to serve.