This Blueberry Cobbler's topping is made with a patchwork pie crust that's fuss-free and tastes delicious. The blueberry filling is easy too: a simple recipe of sugar, cornstarch, blueberries (fresh or frozen, whatever you have on hand!) and lemon juice. Serve with ice cream for the perfect summer treat. Expert tip: Want to make this dessert even faster? Place unrolled crust on surface; cut into 8-inch square, and place over blueberry filling; cut several slits in crust to vent.