Heat oil in a kadai add onions and saute for 2 minutes.

Add tomatoes,green chilly,and salt saute for 2 minutes.

Then add 1/2 cup water and grind this in a mixer.

In a kadai heat the ground mix for 2 minutes.

In another kadai add 1tsp oil and add mustard. when mustard splutters add red chilly and curry leaf.

Add this tempering to ground mix .Add chilly powder and boil for 2 minutes.

Now traditional tomato chutney is ready.