1
Add the teriyaki sauce and cubed steak to a ziploc bag or container. Let it marinate for 30 minutes up to 1 hour in the refrigerator. If using wooden skewers, soak them in water during this time.
2
Preheat the grill to high heat and lightly oil the grill grates. While the grill heats up, thread the bell peppers, red onions and steak onto the skewers.