For the salad, remove the outer leaves from the cabbage, halve the cabbage and remove the hard stalk. Cut quarters into fine strips and knead with 1 tsp. salt and sugar each until the cabbage is soft. Leave to stand for about 5 minutes. Wash the organic orange, dry it and rub the skin off. Squeeze the fruit. Peel another orange so thickly that the white skin is removed. Remove the fillets between the parting skins. Squeeze cabbage, marinate with orange juice, peel, vinegar and 2 tablespoons of oil. Season with pepper and fold in orange fillets.
For the zander, peel and wash the potatoes and cut or slice them into wafer-thin slices. Wash the fish fillets and dab them dry. Dust the skin side of each fillet with flour and cover with the potato slices in flakes. Fry the fillets in a pan with little oil at medium heat until crispy. Season with salt and pepper, turn and fry briefly on the other side again.
Mix sour cream, lemon peel, salt and pepper. Arrange salad, pike-perch and sour cream.