Follow these simple steps to create mouthwatering Sheet Pan Chicken Fajitas:

1. Preheat the Oven: Preheat your oven to 425°F (220°C).
2. Prepare the Chicken: Slice the chicken breasts into thin strips and place them in a large mixing bowl.
3. Add Seasonings: Drizzle olive oil over the chicken strips and add chili powder, cumin, garlic powder, onion powder, smoked paprika, salt, and black pepper. Toss until the chicken is evenly coated with spices.
4. Add Vegetables: Add the sliced bell peppers and onions to the same bowl. Squeeze lime juice over the mixture and toss again until everything is well combined.
5. Arrange on Sheet Pan: Spread the chicken and vegetable mixture evenly on a large baking sheet lined with parchment paper.
6. Bake: Place the baking sheet in the preheated oven and bake for 25-30 minutes. The chicken should be fully cooked, and the vegetables should be tender.
7. Garnish: Remove from the oven and sprinkle with fresh cilantro, if desired.
8. Serve: Serve hot with warm tortillas and your favorite fajita toppings like sour cream, salsa, or guacamole.

Following these steps will guide you in making this incredible dish, ensuring that every detail is perfectly executed.