Preheat oven to 350º F. Blend all ingredients and press into an 8 or 9-inch square pan. Bake for 15 minutes or until edges are just beginning to turn golden.
For Filling:
Combine sour cream, egg, sugar, vanilla, almond extract, and salt. Beat until smooth. Fold in blueberries. Pour into shell and bake at 400º F. for 25 minutes.
For Topping:
Combine all ingredients. Sprinkle over pie and bake 10 additional minutes. Chill before serving.