Sauerkraut fish fillets want to be tender and slippery, first of all, the fish should be selected fresh, the fish should not be cut thick and thin, pickled fish fillets should be stirred in one direction, the fish fillets with egg whites and cornstarch, to master the cooking time, etc., as long as you have mastered these, made out of sour pickled fish fish fillets and slippery and tender.