1½ cups granulated sugar.
¾ cup sour cream.
3½ tablespoons cornstarch.
2 teaspoons fresh lemon zest.
4 large eggs, room temperature.
2 teaspoons pure vanilla extract.
2¼ cups fresh blueberries, washed and dried.
3 tablespoons all-purpose flour.
4 cups frozen blueberries.
¾ cup granulated sugar.
2 teaspoons fresh lemon zest.
1 tablespoon cornstarch.
2 tablespoons cold water.
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