How long does it take to make Fish in tomato sauce?

Cook the sauce about 10 minutes, then the fish in it 12–15 minutes, covered.

#	What to do	How long
1	In a bowl, mix the tomato paste, olive oil, garlic, paprika and cumin with the salt	—
2	Add and fry 3 minutes	—
3	Add the cumin and paprika and stir about a minute	—
4	Add the lemon juice to the bubbling sauce	—
5	Pat the fish pieces dry with paper towels and place it in the sauce, skin side down, and spoon some of the sauce over it. Cover and cook over medium-low heat 12–15 minutes	—
6	Turn off the heat and sprinkle the cilantro over the top	—

Add by cooking time: what needs long (onion, carrot, meat) goes in first, and what burns fast (garlic, dry spices) goes in last, only until fragrant.

A gentle simmer, not a boil: a hard boil dries the food out and clouds it, a slow simmer cooks it evenly.
Pat the fish dry and don't overcook it: wet fish thins the sauce, and overcooked fish dries out and falls apart.