Blueberries 'n' Cream Cheesecake

2 1/2 cups fresh blueberries
1 tablespoon cornstarch
24 ounces cream cheese (at room temperature)
1 cup granulated sugar
5 eggs
2 tablespoons cornstarch
1/4 teaspoon salt
1 1/2 cups sour cream
2 tablespoons granulated sugar
1/2 teaspoon vanilla extract
1/4 cup granulated sugar
1/4 cup water
1 cup fresh blueberries

Combine 2 1/2 cups blueberries and 1 tablespoon cornstarch in blender; blend until smooth. Cook pur