Flat Rice Bread from Southern India: Uttapam

Name: Flat Rice Bread from Southern India: Uttapam
Ingredients: Generous 1 cup basmati rice; 1/2 cup white lentils (hulled, split urad dal); Salt; 1 teaspoon sugar; 1/2 teaspoon baking soda; 1 cup chopped onions; 1 cup skinned, seeded and diced tomatoes; 1 green chile, chopped; 1/2 cup chopped fresh cilantro leaves; Ghee or vegetable oil, as desired; Sambhar, recipe follows; 5 tablespoons vegetable oil; 3 dried red chiles; 5 teaspoons coriander seeds; 1/2 teaspoon fenugreek seeds; 4 tablespoons grated fresh coconut; 3/4 cup yellow lentils (toover dal); 1/2 teaspoon ground turmeric; 1/2 cup sliced onions; 1/4 teaspoon ground asafetida; 1/2 cup diced tomatoes; 1 cup diced eggplant; 3/4 ounce tamarind pulp; 1/2 teaspoon sugar; 8 curry leaves; 1/2 teaspoon mustard seeds