Wash the potatoes and cook for about 20 minutes. Quench, peel and let cool down a little
Wash the fish, pat dry and cut into pieces. Sprinkle with lemon juice. Clean, wash and chop the zucchini and spring onions. Cut potatoes into large slices. Peel onion, chop finely
Heat 1 tablespoon of oil. Season fish with salt and pepper. Fry in hot oil for 3-4 minutes on each side. Take out
Heat 2 tablespoons of oil in the frying oil. Fry the potatoes, onion, zucchini and spring onions for about 2 minutes. Season with salt and cayenne pepper
Stir in tomatoes, sour cream and stock, simmer for 5 minutes. Carefully mix in the fish and heat it up. Season to taste