Heat oil in large skillet on medium-high heat. Add onions; cook and stir 3 minutes or until slightly softened. Remove onions from skillet. Add beef, seasoned salt and Smokehouse Pepper to skillet; cook and stir 5 minutes or until beef is no longer pink.
Return onions to skillet; cook and stir 1 to 2 minutes or until heated through.
Split rolls without cutting all the way through. Place rolls, cut-side up, on baking sheet. Spoon about 3/4 cup beef and onion mixture onto each roll. Sprinkle with 1/4 cup shredded cheese. Broil 30 to 45 seconds or just until cheese is melted.