4 small boneless skinless chicken breasts (1 lb.)
1 small onion, cut into 1/2-inch thick slices
1/3 cup KRAFT THICK 'N SPICY Original Barbecue Sauce
8 slices Italian bread (each 1/4" thick), toasted
4 KRAFT DELI DELUXE Process Bacon Cheddar Cheese Slices
HEAT grill to medium-high heat.
GRILL chicken and onions 8 min., turning onions frequently. Transfer onions to bowl. Turn chicken; grill 7 to 9 min. or until done (165F), turning occasionally.
CUT chicken into strips. Add barbecue sauce to onions; toss to coat.
FILL bread slices with chicken, cheese and onions.