Preheat oven to 350F. Start by unrolling the crescent roll dough and separating it into fourths. Press the seams to create a solid rectangle. Place several spoonfuls of pie filling onto each rectangle. Fold over, to create a square, and press edges together. Bake for about 20 minutes, or until pastry is light golden brown. Go ahead and make the glaze while your turnovers are baking. Place powdered sugar into a bowl and add water (a little bit at a time), stirring, until you have created a thick glaze. Add more powdered sugar or water, as needed, to get the right consistency and amount of glaze that you’d like for your turnovers. Let pastries cool for a minute or two, after coming out of the oven, before topping them with glaze. Serve right away!