Heat 1 tablespoon oil in alarge pan.
Add mustard seeds and cumin seeds. Let them splutter.
Add sliced onions and sautéuntil golden brown.
Add ginger-garlic paste and green chilies. Sauté for a minute until fragrant.
Add chopped tomatoes and cook until soft.
Add coriander powder, red chili powder, and remaining turmeric powder. Cook until the oil starts to separate.
Add the marinated chicken and mix well.
Cook for 5-7 minutes, then add the blended coconut paste.
Add water as needed to reach your desired consistency.
Simmer until the chicken iscooked through (about 20 minutes).
Stir in garam masala and curry leaves. Cook for another 5 minutes.
Garnish with fresh coriander leaves.