Imitation sour cream should work in this.

Joe

SOUR CREAM BERRY PIE
1 beaten egg
1 c. sour cream (or 1/2 c. sour cream
and 1/2 c. yogurt)
3/4 c. sugar
2 tbsp. flour
1/4 tsp. salt
1 tsp. vanilla
Beat all ingredients together in a blender for 5 minutes. Fold in 2 1/2 cups fresh berries or fruit. Pour into pie crust. Bake 25 minutes at 350 degrees. Sprinkle top with 3 teaspoons each of flour, sugar, margarine and nuts and 1/4 teaspoon nutmeg. Bake an additional 10 minutes at 350 degrees.