Cut the skirt steak into about quarter-inch thick slices against the grain.
Add the steak, peppers, onions, olive oil, onion powder, garlic powder, cumin, chili powder, salt, pepper, chipotle powder, dried oregano, and lime juice to a sheet pan. Toss until everything is evenly coated.
Spread everything out in an even layer and bake for 20 to 25 minutes until the vegetables are tender and the steak is cooked through.
Serve with warmed tortillas and your favorite fajita toppings.
Notes
To control the doneness of the steak, divide the seasoning, oil, and lime juice between two bowls. Toss the vegetables in one and the steak in the other, cook the vegetables for 10 minutes first, then add the steak and finish cooking until it reaches your desired doneness.
Slice the steak against the grain to keep it tender
Spread everything out in an even layer on the pan so it roasts instead of steaming
Toss everything well so the seasoning coats evenly
Add jalapenos or cayenne if you want more heat
Warm tortillas right before serving for the best texture
Store leftovers in the fridge for up to 4 days and reheat in a skillet
You can prep everything ahead and keep it in the fridge for up to 24 hours before cooking