2 1/2 pounds
(1.13 kilograms, about 8 cups) Concord grapes
1 cup
(198 grams) granulated sugar
1/4 cup
(28 grams) cornstarch
1/2 teaspoon
fine sea salt
1 teaspoon
vanilla extract
1
par-baked pie crust, cooled completely
4
large egg whites
1/2 teaspoon
cream of tartar
1 cup
(198 grams) granulated sugar
Pinch
fine sea salt