Blanch 4-6 tomatoes by dipping them in boiling water for a minute, and then immersing them in ice water. The skin should peel right off.
In a saucepan, saute 1/2 tsp of cumin seeds. When they sputter add 2 dried red chillies (you may add more if you like it extra spicy), 1 tsp turmeric powder, 2-3 cloves of garlic, chopped, 1 small onion, chopped, 1 tsp coriander powder
Allow this mixture to saute until onions are translucent
Add tomatoes, chopped to the mixture and allow the tomatoes to soften. Add 1 tsp of salt.
In a blender, puree the mixture completely.
Return the mixture to the saucepan and cover, allow the puree to reduce until the tomatoes are fully cooked. Add water and stir as necessary so the chutney does not boil.
Remove from flame.
Add a tbsp of oil into a saucepan.This step is called tempering. Add 1 tsp mustard seeds. Allow to sputter. Add asafetida powder and 2-3 curry leaves (if available). Saute for just a few seconds.
Add the mixture to the chutney.
Add a tsp of sugar and a tsp of salt and stir.
10. Allow to cool before serving.