Sour Cream Apple Pie

1 cup sour cream
3/4 cup sugar
2 tablspoons enriched flour
1/4 teaspoon salt
1 teaspoon vanilla
1 egg
2 cups, thinly sliced, peeled tart apples
1 recipe 8-inch plain pastry (unbaked pie shell)

Beat together cream, sugar, flour, salt, vanilla, egg until well blended. Add apples. Pour into an 8 inch unbaked pie shell. Bake at 400°F for 25 minutes.

Topping

1/3 cup brown sugar
1/3 cup enriched flour
1/4 cup butter
1/4 cup chopped pecans (optional)

After the pie has baked for 25 min, mix the topping together, cover top of pie and bake 20 minutes more.