Place steak, peppers, onion, garlic, olive oil, lime juice, chili powder, cumin, paprika, salt, and pepper in a large resealable freezer bag.
Remove excess air, seal, and freeze.
Thaw overnight in the fridge.
Bake at 400°F for 20 minutes on a parchment paper lined baking sheet.
Or cook in the air fryer. Preheat air fryer to 390°. Cook for 5 minutes at 390°. Mix up the steak mixture. Continue cooking for an additional 5-10 minutes until your desired doneness.
Serve with fresh lime and cilantro in flour tortillas with your choice of fajita toppings.