Preheat oven to 450 degrees.
In a blender or large bowl,mix eggs, milk, flour, sugar, vanilla, salt,
and cinnamon until blended. (If using an electric mixer, batter will
remain slightly lumpy.
In the oven, melt butter in a 12 inch fluted porcelain quiche pan or
a 13 by 9 inch baking dish. Add apple slices and return to oven
until butter sizzles. Do not let it brown. Remove dish from the
oven and immediately pour batter over apples. Sprinkle with brown
Bake in the middle of the oven 20 minutes or until puffed and
brown. Serve immediately.