COOK pasta as directed on package.
MEANWHILE, cook meat in 2 Tbsp. of the dressing in large skillet 5 min. or until meat is browned on both sides, turning after 3 min. Stir in tomatoes, vegetables, remaining 2 Tbsp. dressing and the liquid. Bring to boil. Reduce heat to medium; simmer 10 min. or until meat is cooked through and vegetables are crisp-tender.
TOP with cheese; cover. Let stand 2 to 3 min. or until cheese is melted. Serve over hot drained pasta.