Name: Blueberry Crumb Bars
Ingredients: 1 cup dark brown sugar; 2 3/4 cups all-purpose flour; 1 cup cold unsalted butter (2 sticks), cut into tiny cubes; 1 large egg, at room temperature; 1/2 teaspoon salt; Zest and juice of one small lemon; divided; 5 cups fresh blueberries; 1/2 cup + 2 tablespoons white sugar; 4 tablespoons cornstarch; 1 tablespoon crystalized ginger, chopped