The Fish Market Apple Pie

In a food processor fitted with the steel blade, blend:
1-3/4 cups all-purpose flour
1/4 cup sugar
1 tsp cinnamon
3/4 tsp salt
1 stick plus 3Tbs unsalted butter, cut into bits

Blend until mixture resembles meal. Transfer to a bowl.
Add 1/4 cup apple cider and combine with mixture to form a dough.
Shape the dough into a ball and chill, wrapped in floured wax paper, for 1 hour.

In a bowl combine:
6 large McIntosh apples, peeled and sliced, or enough to measure 8 cups.
1-2/3 cups sour cream
1 cup sugar
1 large egg
1/3 cup all-purpose flour
2 tsp vanilla
1/2 tsp salt

On a floured surface, roll dough into a 12 inch round.
Fit into a 10-inch pie plate, crimp the edge decoratively.
Spoon the filling into the sheet.

Bake in a preheated oven 450 degrees for 10 minutes. Reduce heat to 350 degrees and bake for 35 additional minutes.

TOPPING

In a bowl combine:
1 cup chopped walnuts
1/2 cup all-purpose flour
1 stick unsalted butter, softened
1/3 cup sugar
1/3 cup packed dark brown sugar
1 Tbs cinnamon
pinch of salt

Mix until crumbly. 

Mash the apple filling lightly with a fork, sprinkle the streusel over the filling and bake for 15 minutes.

Let the pie cool on a rack.