Chop onions and tomatoes roughly

Heat a pan. Add 2 tsp oil

Fry urad dal, channa dal and red chilli. Once the dals turn light brown, take it out into a mixie jar

In the same pan, fry onions and garlic till the onions turn light pink

Add tomatoes and required salt. Fry until tomatoes soften nicely

Add tamarind and coconut and mix well for 2 min

Let the mixture cool down completely

Dry grind the mixie jar with the roasted dals+chilli

Add the onions+tomatoes mixture and grind to a thick chutney without adding water

Take the chutney into a bowl

Heat a pan. Add 1 tsp oil

Fry mustard till it splutters. Add curry leaves

Add the ground chutney and saute for 2-3 minutes

Take it out into a serving bowl

Serve with idlis, dosas or oothappams.