Tomato Gostu recipe - Tomato Kosthu recipe - Simple side dish

Tomato Gostu or Tomato Kosthu is a simple side dish which goes well with idli / dosa or pongal. The name is new to me but my mum does this quite often for idyappam or idli she calls it just paruppu. I find it goes well with idli / dosa or rava pongal .. This gostu will be watery than Sambar. 
Ingredients

Onion - 1 (chopped finely)
Tomatoes - 3 slice into 2)
Green Chillies - 2-3 (slit into 2. Adjust to spice level)
Moong dhal  -1/4 cup
Oil - 2 teaspoon
Sambar powder - 1 teaspoon
Mustard seeds - 1/4 teaspoon
Urad dhal - 1 teaspoon
Turmeric powder - 1/4 teaspoon
Curry leaves - 10
Coriander leaves - 2 tablespoon (finely chopped)
Salt to taste

Method:

Heat the oil and add mustard seeds. Let it pop. Add urad dhal, curry leaves. Fry till brown in color. Add Onion and fry till transparent
Add Green chillies, Moong dhal, turmeric powder and sliced tomatoes. Add 1/2 cup of water and cook it till 2-3 whistle. Switch it off. 

Once cool down remove the skin of tomato and mash it. 
Add it back to the sambar.Add sambar powder, 1/2 cup of water and mix well. Let it boil for another 5-7 mins.
Add coriander leaves. 
Switch it off and serve hot



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