1Heat oil in a pan and fry the urad dal till it turns slightly brown.
2Add the dry red chillies, ginger piece and garlic pods. Fry for a minute or so.
3Add the onion and tomato pieces. Saute for few minutes till both the onion and tomato pieces are soft but not browned.
4Switch off and cool the mixture a bit.
5Grind it to a smooth chutney along with salt. (You can add a very tiny piece of tamarind if you feel the tomatoes are not sour enough.)
6Transfer the chutney to a serving dish.