Moong dal : 2 tbsps
Shallots/Small onion : 1/2 cup
Chopped tomatoes : 1/2 cup
Red chilly powder : 1 tsp
Turmeric powder : 1/4 tsp
Cumin seeds : 1/4 tsp
Mustard seeds : 1/4 tsp
Cook moong dal with extra water and keep aside.
Heat oil in a pan,add mustard seeds & cumin seeds.
Once mustard cracks add shallots ,tomatoes,curry leaves and stir.
Add salt to it.
Smash the tomatoes with ladle and now add turmeric powder, red chilly powder and let it cook on low flame.
Add the cooked dal and mix and let the sambar boil for few minutes.
Remove from flame ,add coriander leaves.
Serve with hot Idlies or with crispy dosas.