Bring the milk to the boil. Add rice, salt and butter and leave to soak for about 20 minutes. Cut the fruit into 2 cm pieces. Slice the zest of the lemon with a grater for a better flavor.
Beat eggs, sugar and lemon zest until frothy. Fold in the rice and fruits. Put the mixture in a greased baking dish. Bake in a preheated oven at 200 ° C for about 30 minutes. Then sprinkle the casserole with powdered sugar and serve.