HEAT oil in large skillet on medium-high heat. Add steaks; cook 1 min. on each side or until lightly browned on both sides. Meanwhile, combine tomatoes, peppers and dressing.
SPOON tomato mixture over steaks; top with stuffing and cheese. Cover.
SIMMER on medium-low heat 3 to 5 min. or until cheese is melted and steak is cooked to medium doneness (160°F).