Tomato onion chutney

Once I had decided to make upma kozakattai for lunch, I had to find something to go with it. Too lazy to make sambar, I settled on this traditional tomato-onion chutney instead. Next time, I'll make it with shallots.

3 tomatoes
1 onion*
6 pods garlic
1 red chilli

1/2 tsp mustard seeds
1/2 tsp urad dal
1 sprig curry leaves, chopped
A pinch of hing
Salt to taste
1 tsp cooking oil

Method:
Chop the onions, and keep half aside for tempering.
Grind together tomatoes, 1/2 onion, garlic and the red chilli.
Heat the oil, temper with mustard seeds, and once it stops spluttering add urad dal, 1/2 onion, curry leaves and hing.
When the onions start turning transparent, add the ground masala, and cook on a low heat, till the oil starts seperating.
Serve with dosas, idli, paniyaram or upma kozakuttai.

*- you can replace with 1/2 onion and some shallots.