INGREDIENTS
•
3/4 cup sugar, divided
•
2 teaspoons cornstarch
•
1 tablespoon freshly squeezed lemon juice
•
2 cups blueberries
•
1 1/2 cups all-purpose flour
•
1/2 teaspoon baking powder
•
1/4 teaspoon salt
•
1 large egg yolk
•
1 teaspoon vanilla extract
•
Zest of 1 lemon
•
1/2 cup (1 stick) unsalted butter, cut into cubes
•
1 1/2 tablespoons turbinado sugar