Heat Oven To 375 Degrees F. If Using Crescent Rolls: Unroll Dough; Separate Dough Into 4 Rectangles. Firmly Press Perforations To Seal. On Ungreased Cookie Sheet, Press Or Roll Each To Form 7X5-Inch Rectangle. If Using Dough Sheet: Unroll Dough; Cut Into 4 Rectangles. On Ungreased Cookie Sheet, Press Or Roll Each To Form 7X5-Inch Rectangle. Place One Ham Slice And One Cheese Slice On Each Rectangle. For Each Rectangle, Fold Dough In Half Over Filling; Press Edges Firmly To Seal. Bake 10 To 13 Minutes Or Until Golden Brown.