Simple Tomato chutney or Thakkali Chutney is a very popular recipe all over india made with just tomatoes, chillies and garlic can be served with idli, dosa, paniyaram, masala dosa, or as a spread for sandwich.
Heat 1 tsp oil in a pan, add in urad dal and chillies and saute till golden.
Now add in tomatoes, salt and sugar and mix well. Cover and simmer the pan and cook for 5 to 10 mins. Now it is cooked. Take this in a blender and puree till smooth.
Now make seasoning, heat oil in a pan, add in mustard seeds, hing, curry leaves and mix well.
Add in chutney and cook till oil separates.
Serve with dosa.
Video
Notes
Make sure you use ripe red tomatoes which are a little sour for best taste.
Use gingelly oil for maximum flavour. But any flavourless oil can be used as per your preference.
Urad dal can be substituted with chana dal, flax seeds or sesame seeds. Check my variation in tomato chutney below.