Concord Grape Pie
["4 c. grapes", "3/4 c. sugar", "1 tsp. butter", "3 Tbsp. cornstarch", "1/4 tsp. salt", "Pastry for 2 crust 9- inch pie"]
["Slip skins from grapes and set aside. Heat grapes in saucepan for 3 to 4 minutes. Then run through a sieve to remove seeds. Combine pulp, skins, cornstarch, sugar and salt."]
["grapes", "sugar", "butter", "cornstarch", "salt", "Pastry"]