Heat oil in a pressure cooker and add the shallots and garlic. Saute for a minute and add tomato sauce and both chilli powders.
Add the chicken drumsticks and season with salt. Mix well to combine, close the lid and cook for 2 whistles. Do not add any water.
Open the PC, remove the drumsticks to a dish, reduce the liquid to get saucy consistency and add coriander leaves. Remove from flame and spoon the sauce over the drumsticks.