4 large apples, McIntosh or Granny Smith (4 cups)
1 unbaked 9-inch pie shell
1 cup granulated sugar
3 tbs. all-purpose flour
1/2 tsp. ground cinnamon
1 egg
1 cup heavy (whipping) cream
1 tsp. vanilla extract

In a food processor, mix the first 6 streusel ingredients.  Add the butter and process until the mixture is crumbly; it should still have a dry look to it - don't over process.

Preheat oven to 350 degrees. Peel, core and thinly slice the apples; there should be 4 cups.  Place the apples in the pie shell.  In a small bowl, mix the sugar, flour and cinnamon.  Beat the egg in a medium bowl, and add the cream and vanilla.  Add the sugar mixture to the egg mixture and blend.  Pour over the apples.  Bake for 1 hour  in the lower one-third of the oven.  After 20 minutes, sprinkle streusel over the top and continue  baking approximately 40 minutes longer, or until the top puffs or is golden brown.