Peel, core and cut apples into quarters. Slice finely and reserve.
Mix flour and sugar. Add eggs one by one while mixing. Then pour milk little by little until your obtain a kind of pastry dough pancakes.
Grease the baking dish with butter. Place apples in your oven dish. Pour the mixture into the baking dish and bake for 50-55 minutes. Watch regularly after 35 minutes.