Rasam from "The New Laurel's Kitchen"
4 small cloves garlic
1/4 teaspoon cumin powder
1/2 teaspoon black peppercorns
1 tablespoon oil
2 teaspoons black mustard seeds
1/2 teaspoon cumin seed
2 tomatoes quartered
1 cup water
1 teaspoon turmeric
1/2 teaspoon salt
2 teaspoons tamarind concentrate dissolved in 1 cup hot water
OR
juice of one lemon in 1 cup hot water
1 cup well cooked yellow split peas
"Crush the garlic, cumin and peppecorns with a mortar and pestle or in a blender using just enough water to cover the blades.
"Heat the oil in a very heavy small pan. Add the mustard seeds, coating the bottom of the pan evenly. Cover the pan quickly and listen for the moment when the furious sound of popping slows dramatically. Then add the cumin seeds so that they brown, but almost immediately turn off the flame and add the tomato, water, and turmeric, then add the garlic mixture.
"Bring to a boil and add the tamarind or lemon and salt. Mash the peas and add them too.Simmer gently until the tomatoes are soft, about ten minutes. In Kerala they take advantage of the way this soup separates, serving the liquid top part over rice at the beginning of the meal and the thick bottom part over rice at the end of it. If you want a uniformly creamy soup, give the finished version a spin in the blender."
Laurel also says,"This exceedingly spicy broth is credited with curing colds in South India, and if it seems to do the same in North America, who can complain? The cures are undocumented but the brew is breathtaking, no doubt about it. For a less fiery version (and more soup) use 6 tomatoes and add extra water. For lemon Rasam, omit the tomatoes, and stand back!"
(The New Laurel's Kitchen, by Laurel Robertson, Carol Flinders and Brian Ruppenthal. c.1976, 1986, printed by Ten Speed Press.)