In a pan dry roast all the spices mentioned under Coorg Masala (Except turmeric) until nicely brown but nut burnt. Let it cool and then add turmeric.
Grind in a coffee grinder to a fine powder. (I kept it slightly coarse)
Wash chicken.Make slits on the drumstick with a sharp knife. Add 2 tbsps of above-prepared masala and salt to taste. Marinate atlaest 1 hour or overnight.
Thaw marinated chicken and bring to room temperature. In a pan add 1.5 tbsp oil and heat it.
On high heat sear the drumsticks for 5-8 minuts in batches ( 3 pieces first,followed by the rest ). The pieces should look slightly roasted outside.Keep aside.
In the same pan add rest of the oil. When oil is hot add crushed curry leaves,folowed by choped Onion. Fry till brown. Add chopped Garlic. Fry till raw smell is gone.
Add the seared Chicken drumsticks to the pan. Add chilli powder,Slitted green chillies (If using). Cook on medium-high heat for 5 minutes. (If we want more intense flavours, you can add rest of the masala powder as per taste at this point)
Add Kachampuli. Give everything a good mix. Add 1 cup of water. Let it cook and allow the spices to come together. This
Serve with white rice.