Take a large mixing bowl and add thick curd (yogurt). Make sure the curd is not watery. Then add ginger-garlic paste, turmeric powder, red chili powder, garam masala, cumin powder, coriander powder, and salt.
Mix all the ingredients well to form a smooth paste. Add mustard oil or melted butter for richness and flavor. You can also crush kasuri methi between your palms and add it to the mixture for an authentic taste.
The marinade should be thick enough to coat the chicken evenly.