Tomato chutney is a very good accompaniment with idlis and dosas.CAn be made quickly with very few ingredients.
Onion- 2,medium sized,sliced long
Tomatoes -3,medium sized,sliced long
Green chilli-1( add according to your tase)
Kashmiri mirch-1 teaspoon( to give colour)
Fresh Coriander leaves -3-4 stems
Salt to taste
Saute onions .When slightly brown add tomatoes.Add the green chilli and the red chilli powder and salt and cook till tomatoes are cooked. Take off stove.
Add the coriander leaves and grind in a blender or mixie.If grinding hot ,keep a cloth over teh blender top and grind.
You may also temper this chutney with mustard seeds, dried red chillies and curry leaves.
This chutney can be used for a day or two if kept refrigerated.
I sometimes add the leftover chutney when making dals.