01 - In a large bowl, combine sliced beef with olive oil, chili powder, cumin, smoked paprika, garlic powder, onion powder, salt, black pepper, and lime juice. Toss thoroughly and allow to marinate for 10 minutes while preparing vegetables.
02 - Heat a large skillet or cast-iron pan over medium-high heat. Add beef strips in a single layer and sear for 2 to 3 minutes per side until browned and just cooked through. Remove beef from pan and set aside.
03 - Add additional oil to the skillet if needed. Introduce sliced onion and bell peppers, sautéing for 5 to 6 minutes until tender with slight charring.
04 - Return beef along with any accumulated juices to the skillet. Toss with vegetables and cook for an additional 1 to 2 minutes until heated evenly.
05 - Immediately serve with warm tortillas and preferred garnishes such as cilantro, lime wedges, sour cream, shredded cheese, or salsa.