Wash, drain and stem grapes. Remove and grind skins and set aside. Simmer pulp for 5 minutes. (Don't add water to pulp.) While hot, press pulp through sieve to remove seeds.combine steamed pulp with ground skins. Combine sugar and flour and add to grapes. Blend in lemon juice and butter. Put into 1 - 9 inch pie crust. Top with crumb topping.
1 cup flour
1/2 cup sugar
1/4 cup butter
Mix until crumbly. Bake at 350 degrees F. for 40 minutes.