Creating steak fajitas is straightforward. Follow these steps to ensure a delicious outcome:

1. Marinate the Steak: In a bowl, combine olive oil, lime juice, chili powder, cumin, garlic powder, onion powder, salt, and black pepper. Add the flank steak and coat it well. Allow it to marinate for at least 15 minutes (or up to 2 hours for deeper flavor).
2. Preheat Your Grill or Skillet: While the steak marinates, heat a grill pan or skillet over medium-high heat.
3. Cook the Steak: Remove the steak from the marinade, allowing excess to drip off. Place it on the hot grill or skillet and cook for 4-6 minutes on each side for medium-rare. Adjust time based on your preferred doneness.
4. Rest the Steak: Once cooked, remove the steak from the heat and let it rest for at least 5 minutes. This helps keep the juices from running out when you slice it.
5. Sauté the Vegetables: In the same skillet (or another one), add the sliced bell pepper and onion. Sauté for about 5-7 minutes, until softened and slightly charred.
6. Slice the Steak: After resting, slice the steak against the grain into thin strips.
7. Warm the Tortillas: Briefly warm the tortillas in a dry pan or microwave them for about 30 seconds to make them more pliable.
8. Assemble the Fajitas: On each tortilla, lay down a portion of steak, followed by sautéed peppers and onions.
9. Add Toppings: If desired, add salsa, sour cream, guacamole, and shredded cheese for additional flavor.
10. Serve Immediately: Enjoy the fajitas while they are hot, allowing everyone to customize their own with their favorite toppings.

These simple steps will lead you to delicious steak fajitas that your friends and family will remember!