Mix ground beef and Seasoning until well blended. Shape into 4 patties.
Grill over medium heat 4 to 6 minutes per side or until burgers are cooked through (internal temperature of 160°F). Grill onions and bell peppers in grill basket or grill rack 3 to 4 minutes or until tender and lightly browned, stirring frequently. Add cheese slices to burgers 1 minute before cooking is completed.
Serve burgers on rolls topped with grilled onion and bell pepper mixture.