Separate or cut dough into 4 long rectangles (if using crescent rolls, press perforations to seal). Place bacon on center of each rectangle.
In bowl, mix cheese and mayonnaise. Spoon cheese mixture over bacon; sprinkle with tomato. Fold short sides of dough to center of each rectangle; press edges to seal. Place seam side down on ungreased cookie sheet; press short sides with fork to seal. Cut 2 slits on top.