HEAT large nonstick skillet on medium-high heat. Add sausages; cook 12 min. or until done (160ºF), turning after 6 min. Remove sausages from skillet; cover. Discard drippings from skillet.
ADD peppers, onions and dressing to skillet; cook and stir 5 min. or until vegetables are crisp-tender. Stir in tomatoes. Bring to boil; cook 5 min., stirring occasionally.
CUT sausages lengthwise in half, being careful to not cut all the way through to bottom of each. Open sausages; place, cut-sides down, on bottom halves of rolls. Cover with pepper mixture, cheese and tops of rolls.