3Bring to boil. Stir in lemon juice and butter. Remove from heat.
4When cool add 4 cups of berries. Be careful not to break berries, mix thoroughly.
5Chill.
6Beat whipping cream until thick. Blend in vanilla and powdered sugar.
Assembly
1Shortly before serving pour filling into crust and frost top with whipped cream. Do not assemble until you are ready to serve or the crust will become soggy.