Walnut Pumpkin Pie

(I haven't tried this yet)
1 graham cracker pie crust
1 15-oz can pumpkin
1 14-oz. can sweetened condensed milk
1 egg
1 1/4 t. ground cinnamon, divided
1/2 t. ground ginger
1/2 t. nutmeg
1/2 t. salt
1/4 c. packed brown sugar
2 T. all-purpose flour
2 T. cold margarine, or butter
3/4 c. chopped walnuts

Heat oven to 425 degrees. In mixing bowl, combine pumpkin, sweetened condensed milk, egg 3/4 t. cinnamon, ginger, nutmeg, and salt; mix well. Turn into pie crust. Bake 15 minutes. Remove pie. Reduce oven temperature to 350 degrees. In small bowl, combine sugar, flour, and remaining 1/2 t. cinnamon; cut in margarine until crumbly. Stir in walnuts. Sprinkle walnut mixture evenly over pie. Bake 40 min or until knife inserted 1 in. from edge comes out clean. Cool. Garnish as desired. Refrigerate leftovers. Makes 8 servings.