Mix flour, starch, 1/2 teaspoon salt and baking powder. Add mineral water and milk, stir until smooth. Put the dough in a cool place. Clean, wash and cut the peppers into strips. Peel and chop onion. Cook rice in boiling salted water according to package instructions. Heat 2 tablespoons of oil, fry the paprika and onion.
Fry for 5 minutes. Stir in sauce and 100 ml water, bring to the boil and simmer on low heat for 5-8 minutes. Wash the fish, dab dry and cut into cubes. Pull the fish through the dough in portions and fry in 1 litre of hot oil. Drain on kitchen paper. Season paprika vegetables with soy sauce and serve with fish and rice. Garnish with coriander