For 4 people

1/2 cup thoor dhal or yellow split peas
1 1/4 cups water
1/8 teaspoon ground turmeric
1/4 teaspoon tamarind concentrate
1 tablespoon hot water
1/8 teaspoon mustard seeds
1/4 teaspoon fenugreek seeds
1/8 teaspoon ground asafetida
1 tablespoon vegetable oil
2 cups water
1 1/2 teaspoons salt
1 tablespoon Sambar Spice Blend
1 large boiling potato, peeled and cut into 1/4-inch cubes
1 cup coarsely chopped fresh tomatoes
1 cup coarsely chopped onion
1/3 cup cut green beans (1-inch lengths)
1 green chile, serrano, Thai or jalapeno, split lengthwise
5 to 6 sprigs cilantro
10 curry leaves or 2 bay leaves