Preheat oven to 400 degrees F. Roll out pizza dough on a lightly floured surface. Press to form a 12 x 8-inch rectangle.
Arrange ham slices evenly over dough to within 1/2 inch of edges. Sprinkle evenly with cheese. Starting at one of the short ends, roll up dough to form log. Pinch seam together to seal. Place, seam side down, on a greased baking sheet.
Bake for 45-50 minutes, or until deep golden brown. Let stand 10 minutes before cutting into 8 slices with a serrated knife.
Serve with mustard or horseradish sauce, if desired.