Heat oven to 450 F. Place pie crust in a greased pan. Carefully spread softened cream cheese in a 6-inch circle in the middle of pie crust, leaving the outer part of the crust unfilled. Set aside. Toss peaches with sugar and flour and stir finely chopped kale in with the peaches. Add peach-kale mixture over cream cheese. Gently fold edge of crust about 2 inches over kale and peach mixture, leaving center uncovered. Combine sugar and cinnamon; sprinkle evenly over tart. Bake 25 minutes or until crust is golden brown. Cool for 5 minutes before serving and add whipped topping, if desired.