Prepare the rice pudding with a pinch of salt in the milk according to the instructions on the package and then leave to cool. Soak the raisins in some rum.
Separate the eggs. Beat the egg whites into egg whites, then add the egg yolks directly to the rice pudding. Peel and grate the apples. Thoroughly mix all ingredients except for the egg whites. Then carefully fold in the egg whites.
Grease a baking dish with butter and sprinkle with breadcrumbs. Put the rice pudding in the baking dish and sprinkle with some breadcrumbs and butter flakes. Now bake at approx. 180 ° C for 45 minutes.