6 c. seedless green grapes, washed & cut in half
3/4 c. sugar
3 tbsp. cornstarch
1 1/2 tbsp. lemon juice
1 tbsp. butter

Combine grapes and water to cover in a medium saucepan; cover and cook over medium heat 10 minutes or until grapes are soft. Drain off liquid, reserving grapes in saucepan. Add sugar, cornstarch and lemon juice to saucepan, stirring well. Cook over medium heat, stirring occasionally, until thickened. Stir in butter; pour mixture into pastry shell. Cut slits in top crust to allow steam to escape. Bake at 350 degrees for 30 minutes.