Soak the dried red chilies in hot water for 10-15 minutes.
Add the soaked chili (reserve the water), garlic, tamarind, and salt. Add the reserved water step by step and grind to a smooth paste.
Heat the oil in a pan. Add the mustard seeds and when it splutters add the split urad dhal, fry for 30-40 seconds. Add the asafetida and curry leaves, fry for 30 seconds.
Add the ground garlic-chili mixture and cook the chutney for 3-4 minutes until the oil separates.
Transfer to a serving bowl.Serve as a dip for idli, dosa, flatbreads or use as a sandwich spread.