Trim fat off steak; cut into 24 cubes. Place steak, peppers and marinade into a recloseable food storage bag; seal. Toss to coat. Place in refrigerator and marinate a minimum of 45 minutes or up to overnight.
Prepare grill to medium heat. Thread 3 beef, 3 pepper and 2 pineapple on to skewers in desired pattern. Discard bag with marinade.
Place skewers on grill. Grill, turning occasionally, 7-9 minutes or until desired doneness is reached (145°F for medium-rare; 160°F for medium).
Additional marinade may be brushed on during grilling, if desired. Remove from grill. Serve kebabs over cooked rice, if desired.