Tomato:4 
Coriander:cup(chopped) 
Onion:1 sliced 
Cumin seeds:1/2tsp 
Green chillis:2 
Salt 
Oil 
Mustard seeds:1/2tsp 
Split gramdal:1/2tsp 
Curry leaves 

Heat oil -1tbsp,in a nonstick pan.Add the cumin and let them
brown.Add the slit green chillis and sauté them and ad onion and
sauté until it becomes light brown colour.Lastly add coriander
and to:

4 Coriander:cup(chopped) 

Onion:1 sauté for a 1 min.And keep it aside. 
In the same pan,add tsp of oil and the chopped tomatoes and on
medium flame sauté till the rawness of tomato disappers and the
water evaporates.Remove and keep it aside. 
Grind the sauted onions,tomatoes,salt to a paste by adding
fewtbsp of water 
Heat oil in a pan for tempering and the mustard seeds,let them
pop and add the split gram dal and curry leaves and fry till the
dal turns red.and immediately add this to the grind paste.