1 c. sour cream
2 tbsp. flour
3/4 c. sugar
1 tsp. vanilla
1/4 tsp. salt
1 egg, beaten
2 1/2 c. fresh blueberries
1 unbaked pie shell
3 tbsp. flour
3 tbsp. soft butter
3 tbsp. chopped pecans or walnuts

Combine first 6 ingredients, beat 5 minutes at medium speed of an electric mixer or until smooth. Fold in blueberries. Pour filling into pastry shell. Bake at 400 degrees for 25 minutes. Combine remaining ingredients. Stirring well, sprinkle over top of pie. Bake 10 additional minutes. Chill before serving.