Wash and slice vegetables—season steak with salt and pepper and steak seasoning of choice.
Heat a pan on the stovetop over medium heat and add oil or butter; add sliced vegetables. Sautee for 10 minutes or until slightly brown and tender.
Grill the steak or use a cast iron skillet. The time to cook depends on the cut and thickness of the steak, but it should take 7 - 14 minutes. Check the temperature to ensure 145 F.
Fill tortillas with beef, pepper, and onion mixture and toppings of choice.
Notes
No sirloin: Use chicken instead
Additional Sides: Serve with rice and beans or a side salad
