"Makes 16 squares...."
INGREDIENTS
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Filling * 3 cups (390 grams) blueberries, fresh or frozen (not thawed) * 1/2 cup (100 grams) granulated sugar * 1/4 cup (60 ml) orange juice * 4 teaspoons cornstarch * 1 large Granny Smith apple, peeled and sliced Crust + Topping * 1 and 1/2 cups (19