In medium skillet, heat olive oil. Add onion and basil, and a little salt and pepper.
Add garlic, chopped tomatoes, sugar, parsley, red pepper flakes. Cook about 8 minutes on medium until sauce is thickened.
Place the cod in the tomato sauce, spooning sauce over fish.
Cook 8 to 10 minutes until fish is white.
Place spinach on top of the fish and cover. Cook until spinach has wilted over the cod - about 2 minutes.
Recipe Notes
Serve over rice. To make a good rice for this dish ... saute 3 cloves garlic in 1 T. butter, add 1 1/2 c. jasmine rice and 1 chicken bouillon cube, add 3 c. water. Bring to a boil. Return to low and cook for 20 minutes.