German Style Apple Pie

This is a recipe which has been in our family for quite some time. I grew up eating this apple pie at numerous birthday parties and other family occasions and I can tell you one thing about it. IT IS ABSOLUTELY DELICIOUS.
Here's the catch. In europe we make our pies in a so called Springform dish which is a 10" round cake pan with a removable (snap on) outer ring so you can easily remove the cake from the pan. If you do not have one of those Springform dishes please use two round aluminum pie dishes instead.

Ingredients:

Crust:
1 1/2 cups flour, sifted
1/3 cup sugar
9 Tbs butter (equals 1 stick + 1 Tbs), soft but not melted
1 egg
1 tsp Vanilla extract
1/2 tsp baking powder
1/2 tsp baking soda

Filling:
3 granny smith apples, peeled, cored and chopped
3 gala apples, peeled, cored and chopped
* cut the apples however you prefer to eat them. Small chunks, little chunks or even grated with a large cheese grater. That does absolutely not matter. Also I usually add 1Tbs Rum and 1/4 tsp cinnamon to my apples but that is optional.

Crumbs:
1 cup flour, sifted
3/4 cup sugar
1 1/2 sticks butter, soft but not melted
5 Tbs oats

1.) Preheat oven to 350 F
2.) In a medium size bowl combine egg, butter, sugar and vanilla and beat with a mixer until well blended. Add remaining ingredients and beat on high for 3 minutes. The dough will be a bit crumbly and rather solid.
3.) Place dough in the center of your Springform dish and use your hand to spread it evenly. The crust should be about 2,5 inches tall on the side of the Springform dish.
4.) Combine the chopped granny smith apples and the chopped gala apples in a bowl and blend well. You may now also add rum and cinnamon if desired
5.) Pour the apples in your pie dish and spread evenly
6.) In a medium size bowl combine butter, sugar, flour and oats and blend with a mixer for about 2 minutes. Then  crumble the mixture on top of your apples
7.) Bake for about 60 minutes or until the crumbs are golden brown in color. -> If you used two aluminum dishes instead it may already be done after 45 minutes!

Buon appetit