Masala Fry Fish Curry

Name: Masala Fry Fish Curry
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Indian
Ingredients: 2 lbs tilapia ((see notes)); 1/4 cup neutral cooking oil (); 1 yellow onion (); 2 tsp garlic paste ((see notes)); 2 tsp ginger paste ((see notes)); 2 Roma tomatoes (); 1 tsp cumin seeds; 1 tsp carom seeds(ajwain) ((optional)); 1 cup water; 2 serrano chilies ((see notes)); 2 green onions; 10 curry leaves; 1/2 cup cilantro; 1 tsp salt ((see notes)); 1 tsp cumin powder; 1 tsp coriander powder; 1/4 tsp turmeric powder; 1 tsp red chili powder ((see notes)); 1/2 tsp Kashmiri chili powder ((see notes))