In a heavy bottom pan, heat groundnut oil. Roast garlic, we need to bring it to burnt garlic level. Remove from oil and set aside
Add onion to the same oil and cook till soft.
Grind together all the ingredients of chutney to a smooth paste using water
In a small tadka pan, heat oil and add mustard seeds to it. Once they crackle, add jeera seeds and let it brown.Add dry chillies and curry and saute for 2 mins.
Pour on top of the chutney and enjoy with dosa or idly.
Notes
You can use one tart tomato fried instead of tamarind for an interesting twist to this recipe.