Preheat grill to high heat.

Cut steak into bite-sized pieces and place in a medium-sized mixing bowl.

Pour olive oil over steak and toss until evenly coated.

In a small bowl, combine chili powder, cumin, salt, pepper, paprika, garlic powder and onion powder.

Sprinkle seasoning on top of steak and toss to coat; set aside.

Cut peppers and onion into bite-sized pieces.

Thread alternating steak, peppers, and onions onto skewers.

Grill for 8-10 minutes, turning throughout cooking, until meat reaches desired doneness.