Grilled Beef Kebabs

bottle Kikkoman® Teriyaki Marinade & Sauce, plus extra for brushing

beef sirloin tips, cut into 1 1/2-inch cubes

large sweet onion, sliced into 1 1/2-inch cubes

red bell pepper, cut into 1 1/2-inch squares

yellow bell pepper, cut into 1 1/2-inch squares

orange bell pepper, cut into 1 1/2-inch squares

scallions, very thinly sliced

fish sauce

vegetable oil

Kikkoman® Soy Sauce

toasted sesame seeds