Peel and chop the onions and garlic. Cut the chilli pepper lengthwise, remove seeds and wash. Chop the chilli finely. Wash, clean and chop the tomatoes.
Heat 4 tablespoons of oil in a saucepan. Sauté onions and garlic in it. Add chilli, cumin, 100 ml water and tomatoes. Season with salt, pepper and sugar, bring to the boil. Simmer covered for 25-30 minutes.
Wash the coriander and put something aside for garnishing. Chop the rest coarsely and add it to the tomato sauce rouge.
Wash the fish, dab dry and cut each fillet in half. Score the skin side several times. Heat 2 tablespoons of oil in a large frying pan. Fry the fish for about 2 minutes on each side. Season with salt and pepper.
Serve the fish with the rouge. Garnish with the rest of the coriander and 1 chilli pepper. Baguette tastes good with it. Drink tip: white wine, e.g. Sauvignon blanc from South Africa.