bluberry pie

Ingredients
5 cups fresh blueberries
1 tablespoon lemon juice

1 (15 ounce) package refrigerated pie crusts
1 cup sugar
1/2 cup all-purpose flour
1/8 teaspoon salt
1/2 teaspoon ground cinnamon
2 tablespoons butter or margarine
1 large egg, lightly beaten
1 teaspoon sugar

Directions
1SPRINKLE berries with lemon juice; set aside.
2FIT half of pastry in a 9-inch pieplate according to package directions.
3COMBINE 1 cup sugar and next 3 ingredients; add to berries, stirring well.
4Pour into pastry shell, and dot with butter.
5UNFOLD remaining pastry on a lightly floured surface; roll gently with rolling pin to remove creases in pastry.
6Place pastry over filling; seal and crimp edges.
7Cut slits in top of crust to allow steam to escape.
8Brush top of pastry with beaten egg, and sprinkle with 1 teaspoon sugar BAKE at 400° for 35 minutes or until golden.
9Cover edges with aluminum foil to prevent overbrowning, if necessary.
10Serve with vanilla ice cream, if desired.