Preheat oven to 350 degrees.
Unroll dough; separate into 2 long rectangles.
Press each into a 12x4-inch rectangle, firmly pressing perforations to seal.
Spread dressing over each rectangle to edges.
Sprinkle each with bacon, cheese and onions.
Starting with one short side, roll up each rectangle; press edge to seal.
With serrated knife, cut each roll into 8 slices; place on ungreased cookie sheet.
Bake 12-17 minutes or until edges are deep golden brown.
Immediately remove from cookie sheet.