Drizzle olive oil over beef then season. Place bell peppers and onion on a roasting pan. Drizzle olive oil over bell peppers and season with the seasoning mixture. Roast until slightly charred and set aside.
Heat a large cast iron pan over medium heat. Add a splash of olive oil then the beef. Saute beef until cooked through then add the bell peppers. Stir to combine. Adjust salt according to taste. Serve with lime wedges. Yum!
Recipe by Gluten-Free by Jan at https://glutenfreebyjan.com/gluten-free-beef-fajitas/