For serving: Lettuce cups, flour or corn tortillas, rice, beans, cilantro, guacamole, sour cream, cheese and/or salsa
Place 1 pound steak in bowl. You can leave it whole or slice into strips (against the grain).
Combine the olive oil, lime juice, fajita seasoning and garlic in a small bowl. Whisk until combined. Then pour over the steak. Cover the bowl and place the steak in the refrigerator and allow to marinate for at least 60 minutes. Best when marinated for 4 hours+.
Heat 1 Tablespoon olive oil in a skillet to medium-heat heat. Place the steak onto the skillet and cook each side for 3-5 minutes or until reaches desired internal temperature. Be careful not to overcook. Then remove and cover with foil. Allow to rest.
Then add the sliced bell peppers and onions to the pan and cook until sizzling hot, about 3 minutes. Salt and pepper to taste. Slice the steak if you haven't yet (against the grain) and add back to the pan.
Assemble the fajitas. Serve in tortillas, lettuce cups or on top of a salad or rice bowl. Add desired toppings. Serve while warm.