Heat oven to 375. Grease cookie sheet with shortening, or spray with cooking spray. In small bowl, beat egg and milk with fort until well blended; set aside.
Unroll dough; separate crosswise into 2 (6x8 inch) rectangles, firmly pressing perforations to seal. Using knife or pizza cutter, cut rectangles into 8 3x2 inch pieces, for a total of 16.
Fold each slice of turkey in half; place on dough rectangles. Place 1 cheese cube in center of each; fold turkey around cheese cube. Wrap dough up around turkey and cheese, shaping into a ball; pinch tightly to seal. Brush top and sides of each ball with egg mixture; place on cookie sheet.
Bake 10-14 minutes or until golden brown. Sprinkle with powdered sugar. Cool 2 minutes; remove from cookie sheet. Serve warm with maple syrup.