Use your fingers to strip the skin off of the cod. Place the fish in a saucepan and cover it with about 3 inches of water. Set on the stove to boil.
While the cod is boiling, prepare your veggies. Dice the onions, garlic and pepper.
After 20 minutes, check the colour of the water in the pot of cod. If it's cloudy, turn off the stove, throw off the water and taste the fish for saltiness. If the flavour is right, you're ready to move on to the next step. If it's still too salty add a fresh covering of water and return it to the stove to boil some more.
Once your fish is ready, heat the oil in a large sauté pan. When shimmering, add the onions, garlic, pepper and turmeric. Cook until the onion and garlic begin to soften.
Add the cod to the pan and cook for 5 minutes, stirring occasionally.
Serve with boiled green bananas, plantain or dumplings.