1Heat closed medium-size contact grill for 5 to 10 minutes. Place bacon on grill. Close grill. Grill 3 to 4 minutes or until browned. Removed bacon from grill; drain on paper towels. Cut bacon slices crosswise in half.
2Carefully scrape most of drippings from grill into drip tray, using rubber scraper. Place onion on grill. Close grill. Grill 4 to 6 minutes or until tender.
3To make sandwiches, layer bacon, onion and cheese between bread slices. Place sandwiches on grill. Close grill. Grill 3 to 5 minutes or until bread is toasted and cheese is melted.