If you are using fresh or frozen fruit bring it to a boil with optional sugar and a little water on the stove. Reduce heat and cook until it begins to form a light syrup. You do not want a lot of liquid and if using canned fruit you should drain it first. Canned fruit does not need to be sweetened as above. Select a deep baking dish, preferably one which can be heated on top of the stove. Melt the butter in you dish over low heat. In a separate bowl mix together the milk, sugar, and flour to form a batter. Carefully pour the batter into the center of the melted butter and do not stir. Next pour the fruit into the middle of the butter-batter and do not stir. Bake on 350 F until the crust rises and turns a rich golden brown.