Sprinkle beef with steak seasoning. Alternately thread the beef, red pepper, bread cubes and onion onto four metal or soaked wooden skewers; brush with oil.
Grill, covered, over medium heat for 8-10 minutes or until meat reaches desired doneness, turning occasionally. Top with cheese; grill 1-2 minutes longer or until cheese is melted.
In a small bowl, combine coleslaw and walnuts. Serve with kabobs.