Stir in tamarind, peanut-sesame powder, salt, and water. Simmer 10 to 12 minutes until thick and glossy.
Gently add fried peppers. Cover and simmer on low 6 to 8 minutes until tender but intact. Adjust salt and tang.
Garnish with cilantro. Serve warm.
Notes
Make-ahead: Cook gravy through the simmer step; refrigerate up to 2 days. Fry peppers and finish just before serving.Less oil: Shallow-fry in 2 tbsp oil on medium, or brush peppers with oil and air-fry at 375°F for 6 to 8 minutes, turning once.Vegan: Skip dairy; finish with a splash of coconut milk for richness if desired.Refrigerate leftovers up to 3 days. Reheat gently with a splash of water if the gravy tightened.Bitter gravy often means burnt fenugreek or old tamarind. Start with less tamarind and adjust at the end.