Here is the recipe for Kara Chutney served with iddly in TN.
Tomato - 1
Red Chilly - 4-5
Tamrind - 1 small ping pong ball size
Garlic - 5-6 cloves
salt as per taste.
Oil - 1/4 cup
Heat oil is a pan. Add the tomato's and chilly and fry nicely. Once
the tomato is well cooked. remove and cool the mixture. Grind this
with the other ingredints to a smooth paste. Temper with mustard
seeds and karipatha. Serve. This is really hot chutney.