1.Heat oven to 350 degrees F.
2.If using crescent rolls: Unroll dough; press each into 12x8-inch rectangle, firmly pressing perforations to seal. If using dough sheet: Unroll dough; press each into 12x8-inch rectangle.
3.Spread dressing over each rectangle to edges. Sprinkle each with bacon, Cheddar cheese and onions.
4.Starting with one short side, roll up each rectangle; press edge to seal. With serrated knife, cut each roll into 8 slices; place cut side down on ungreased cookie sheet.
5.Bake 12 to 17 minutes or until edges are deep golden brown. Immediately remove from cookie sheet. Serve warm.