Chopped Tomatoes : 1 cup
Chopped onion :1/2 cup
Red chilly : 1
Red chilly powder : 1/2 tsp
Heat 2 tsp oil in a kadai,add mustard seeds,broken red chilly,curry leaves and fry.
Add chopped onion,chopped tomato and fry.
Add salt,turmeric powder,red chilly powder and stir for few minutes.
Add 1/4 cup water and let it boil.
When it is almost thick switch off the flame.
Serve hot with idli / Dosa..