Heat oven to 350°F. Unroll dough and separate into 2 long rectangles; press each into 12x4-inch rectangle, firmly pressing perforations to seal.
Spread dressing over each rectangle to edges. Sprinkle each with bacon, cheese and onions.
Starting with 1 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.
Bake 12 to 17 minutes or until edges are golden brown. Immediately remove from cookie sheet. Serve warm.