Peel and chop the onion and garlic. Heat 1 tablespoon of oil in a large pot. Fry the onion and garlic in it. Sprinkle with 1 tbsp curry. Add 1 1⁄4 l water, broth and lentils, bring to the boil and cook for 10-12 minutes.
Wash, dice and add the tomatoes.
Rinse fish, dab dry, dice and fry in 2 tablespoons of oil all around for about 5 minutes. Season with salt. Wash and chop parsley. Add to the stew with the fish. Season to taste with vinegar, salt, pepper and curry.