Boil the milk with the rice pudding to a porridge - allow to cool. Mix the butter with the egg yolk, sugar and lemon zest to a frothy mass, then mix in the cooled porridge, tablespoon at a time. Beat the egg whites into egg whites and fold into the porridge.
Grease the Ultra Plus (2 l), sprinkle with breadcrumbs and pour in the mixture. Cover with brown sugar and breadcrumbs and bake in the oven at 180 ° for 40 minutes with a lid, then bake for another 20 minutes without a lid.
Cherries or any fruit are served with it. Tastes very tasty and goes in no time!