German Apple Pancakes (30 min. prep, 25 min cook time)

Frühstück, kommen sie und erhalten Sie!  In English, BREAKFAST, COME AND GET IT!
My wonderful mother in law (ok I'm not married but its been 9 years people) picked us up a cast iron skillet from good ole Cracker Barrel a few weeks ago (after we borrowed hers to go camping) and I have been ITCHING to put it to good use. 
This morning I woke up from a dream about pancakes, strange, I know, so decided that I should go back to my roots and whip up some German style pancakes (which by the way is more like 1 ginormous pancake) ANDDD the best part...I get to use my skillet!!  Oh happy day!
Its rather painless really but tastes absolutely divine and it gives a new twist on the regular flat pancakes.
Now, do you want the recipe in English?

4 Eggs
1/2 c. all purpose flour
1/2 tsp. baking powder
1 tbsp. sugar
pinch of salt
1 c. milk
1 tsp. vanilla
1/2 tsp. ground nutmeg

1/4 c. unsalted butter
1/2 c. sugar, divided
1/2 tsp. cinnamon
1/2 tsp. nutmeg
1 large apple (cored, sliced)

In a bowl combine the first 8 ingredients and let stand at least 30 minutes (you can refrigerate overnight)
Preheat oven to 425.
In oven proof skillet melt butter, brushing the sides of the pan.  Mix together sugar, cinnamon, nutmeg and sprinkle on the butter.  Arrange apple slices in a thin layer and sprinkle remaining sugar over top.  Gently pour batter around pan and place in the oven for the first 15 minutes at 425.  Reduce heat to 350 and continue to bake for another 10 minutes.
Remove from pan with a silicone spatula to ensure clean removal.