Walnut Pumpkin Pie

1 prepared graham cracker pie crust
1 can (15 oz.) pumpkin
1 can (14 oz.) sweetened condensed milk
1 egg
1-¼ tsp. cinnamon, divided
½ tsp. each ginger, nutmeg, and salt
¼ cup brown sugar
2 tbsp. flour
2 tbsp. cold margarine
¾ cup chopped walnuts

Heat oven to 425 degrees. Combine pumpkin, sweetened condensed milk, egg, ¾ tsp. cinnamon, ginger, nutmeg, and salt; mix well. Pour into crust.

Bake 15 minutes; remove pie. Reduce oven to 350 degrees.

Combine sugar, flour, and remaining ½ tsp. cinnamon; cut in margarine until crumbly. Stir in walnuts. Sprinkle walnut mixture over pie.

Bake 40 minutes at 350 degrees or until knife inserted comes out clean.

Cool before serving.