Creating Grilled Chicken Fajitas is straightforward if you follow these simple steps:

1. Marinate Chicken: In a bowl, combine olive oil, lime juice, chili powder, cumin, garlic powder, onion powder, salt, and black pepper. Add the chicken breasts and coat them well. Cover and refrigerate for at least 15 minutes.

2. Preheat Grill: While the chicken is marinating, preheat your grill to medium-high heat.

3. Prepare Vegetables: Slice the bell peppers and onion into thin strips. Set aside.

4. Grill Chicken: Remove the chicken from the marinade and place it on the grill. Cook for about 6-7 minutes on each side or until the internal temperature reaches 165°F (75°C).

5. Grill Vegetables: While the chicken is grilling, add the sliced bell peppers and onions to the grill. Cook for about 5-7 minutes until they are tender and slightly charred.

6. Slice Chicken: Once the chicken is done, remove it from the grill and let it rest for a few minutes. Then slice it into thin strips.

7. Combine: In a serving platter, combine the grilled chicken and vegetables.

8. Warm Tortillas: If desired, warm the tortillas on the grill for about 30 seconds on each side.

9. Serve: Serve the grilled chicken and vegetables with tortillas, garnished with fresh cilantro and lime wedges on the side.

These steps will guide you in creating this incredible dish effortlessly.