Preheat oven to 425°. Melt butter in 9x13" or 12" quiche pan. Add apple slices & return to oven until butter sizzles (don't let brown). Meanwhile, in blender add eggs, milk, flour, white sugar, vanilla, salt & cinnamon. Blend then pour over apple mixture. Sprinkle with brown sugar and bake in middle oven for 20 min. or until puffed and brown.