Mix egg with sugar, salt and milk. Sift flour and baking powder over it and stir in.
Boil up the apple juice to 4 tablespoons. Stir the starch and 4 tbsp. apple juice until smooth. Stir into the boiling juice and simmer for about 2 minutes. Fold in frozen berries, bring to the boil briefly. Let the groats cool down.
Heat the oil in a deep frying pan. Pour the dough into the disposable piping bag. Cut off a small corner (approx. 1⁄2 cm Ø). 1⁄4 Spray the dough into the hot oil in a spiral starting in the middle of the pan (see
Figure below). Bake at medium heat for about 2 minutes on each side until golden brown. Bake 3 more crêpes from the remaining dough. Serve with berry jelly. Dust with icing sugar. Whipped cream tastes good with it.