1 1/2 pounds beef boneless top sirloin steak, cut into 1-inch cubes
1 cup teriyaki baste and glaze
1 medium bell pepper, cut into 1-inch pieces
18 medium whole fresh mushrooms
2 tablespoons vegetable oil
1/4 cup sesame seed, toasted
Place beef in shallow glass or plastic dish or heavy-duty resealable plastic bag. Pour teriyaki baste and glaze over beef. Cover dish or seal bag and refrigerate, stirring beef occasionally, at least 4 hours but no longer than 24 hours.
Heat grill to direct heat. Remove beef from marinade; discard marinade. Thread beef, bell pepper and mushrooms alternately on each of six 15-inch metal skewers, leaving space between each piece. Brush bell pepper and mushrooms with oil. Sprinkle kabobs with sesame seed.
Cover and grill kabobs on medium heat 15 to 20 minutes, turning frequently, until beef is no longer pink in center.