Peel, wash and chop the potatoes and cook in salted water for about 20 minutes. Drain, press while hot through a potato press. Let cool down. Melt 25 g butter, allow to cool a little. Knead with the flour, semolina, egg and potatoes until smooth.
Roll out the dough on a little flour about 3 mm. Cut out circles (approx. 9 cm Ø). Place 1 teaspoon of plum jam in the middle of each of the circles. Fold it up and press the edges together well with a fork.
Let the bags simmer in portions in boiling salted water for 6 - 8 minutes. Remove and drain. Heat 150 g butter. Roast breadcrumbs and almonds in it. Mix in the powdered sugar. Turn the pockets inside. Arrange on plates and dust with powdered sugar.