Deliciously prepared apple between two layers of pastry, and the bigger the apple layer is, the tastier the cake is. So use as much apple as you can
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Peel and slice the apple and stew it in butter. When soft, sprinkle with flour and pour 0.3 l stock. Add lemon juice, sugar, salt and sour cream. Boil for a few minutes. Then rub through a sieve, heat up and serve warm.