This is a simple and easy version of rasam that can be made in a jiffy.
3-4 medium sized plum tomatoes
1 1/2 cup water (approx)
2 green chillies,slit
1 tsp (heaped) MTR rasam powder
1 tsp sasam (black mustard seeds)
a few curry leaves
1 tsp oil
salt to taste
a pinch of sugar
1 tsp coriander leaves, chopped
How it's made:
Cut tomatoes in half and cook with 1/2 cup of water until soft. Once cool, blend tomatoes in blender. Return tomato puree back to sauce pan. Add green chillies and 1 cup water. More water can be added. Boil for 5 mins. In a "Phanna Davlo"or small frying pan, heat oil, add mustard seeds. Once it splutters, add rasam powder & curry leaves. Add seasoning to tomatoes. Adjust salt, sugar & garnish with coriander leaves.