I don't know if this is the exact recipe, but you can try and see.

Pumpkin Streusel Pie

Preheat oven 400.

Filling:

1 15 oz. can pumpkin
1 14 oz. can sweetened condensed milk
2 eggs, beaten
1 tsp. ground cinnamon
1/2 tsp. ground ginger
1/2 tsp. ground nutmeg
1/2 tsp. salt

Blend above ingredients, mixing well until well blended.

Streusel topping:

1/2 C firmly packed brown sugar
1/2 C flour
1/4 C. firm butter
1/4 C chopped pecans

Combine sugar and flour. Cut in butter until crumbly. Stir in chopped pecans.

Pour pumpkin mixture into unbaked pie shell. Bake 15 min at 400. Reduce temp to 350 Bake 25 min. Sprinkle streusel topping over pie. Bake 350- 15 - 20 min or until golden brown and filling is set. You can use either a regular one crust pie crust or a graham cracker crust. I hope it's the same recipe or very similar.