Easy Bangladeshi-Style Basa Fish Curry

Ingredients: To fry the fish: -Basa/swai fish filet, cut into bite sized pieces - 1 lb -Salt - 1/3 tsp -Turmeric powder - 1/3 tsp -Oil - 1/2 cup For the curry: -Oil - 1/2 cup (reuse after frying fish) -Onion, chopped - 2/3 cup, or can combine with onion paste -Garlic paste - 1 tbsp -Ginger paste - 1 tbsp -Turmeric powder - 1/2 tsp -Chili powder - 3/4 tsp, or adjust to desired spice level -Salt - 3/4 tsp -Coriander powder - 1/2 tsp -Fenugreek seeds (methi) - 1/2 tsp -Water - add as needed -Cumin powder - 1/2 tsp -Green chilies - as desired -Cilantro - garnish