Preheat oven to 425 degrees. Lightly oil a baking sheet and spread pepper and onion strips onto the pan, tossing gently to coat in oil.
In a small bowl combine 2 Tbsp olive oil and all seasoning spices. (Alternatively you can use a packet of taco seasoning.) Add chicken and toss gently to coat.
Add chicken to the pan, and top with garlic.
Place pan into oven and bake for 25 minutes, or until chicken is cooked through and vegetables are crisp-tender. Squeeze lime wedges over the pan.
Serve with tortillas and optional fajita toppings such as chopped tomato, avocado, sour cream and shredded cheese.