01 - Preheat the oven to 425°F. Line a large sheet pan with parchment paper or foil to ease cleanup.
02 - In a large bowl, whisk together olive oil, chili powder, ground cumin, smoked paprika, garlic powder, onion powder, dried oregano, sea salt, black pepper, and lime juice.
03 - Add the sliced steak, red, yellow, and green bell peppers, and red onion to the marinade. Toss thoroughly to coat evenly.
04 - Spread the marinated steak and vegetables in a single layer on the prepared pan.
05 - Roast in the preheated oven for 17 to 20 minutes, stirring halfway through, until the steak reaches desired doneness and the vegetables are tender with slightly charred edges.
06 - Remove from the oven and serve immediately with warm tortillas. Garnish with chopped cilantro, lime wedges, sour cream, and avocado or guacamole as desired.