juice from 1 lemon 1/4 tsp. turmeric powder 1x1 inch ginger chopped 1 tsp. mustard seeds 2 green chillies chopped 1/2 tsp. salt 2 tomatoes 1/2 tsp. salt 1/4 c. toor dhal 1 Tbsp. coriander leaves
Cook toor dhal with 2 cups water and 1/8 teaspoon turmeric powder until it becomes soft. Heat oil and add mustard seeds. When thy pop add ginger and chillies and fry for a minute. Add tomato pieces, 1 cup water and 1/8 tsp. turmeric paste and boil for 5 minutes. Add salt. To the cooked toor dhal add 2 cups water and mash well. Add this to the rasam and boil for 2 minutes. Remove from heat and add lemon juice and coriander leaves. Mix well.