Preheat your oven to 400 degrees, and lightly spray a large baking sheet with non stick cooking spray.
Prepare the fajita seasoning by combining the chili powder, cumin, paprika, and pepper in a small bowl. Set aside.
In a large bowl, toss together the steak strips, peppers, onions and garlic.
Drizzle meat and vegetables with olive oil and gently toss to coat.
Sprinkle with seasoning over mixture, a little at a time and tossing to coat evenly.
Spread the steak and vegetable mixture on baking sheet, evenly.
Bake for 20 minutes, or until steak is done and vegetables are tender.
During the last 5 minutes of baking, I like to place the tortillas (wrapped in aluminum foil) in oven to heat.
Once your pan is removed from the oven, you can drizzle fresh lime juice over the fajitas, and garnish with fresh chopped cilantro,totally optional.
Serve in tortillas with your favorite fajita toppings.