Preheat oven to 375°F and prepare a sheet pan with parchment paper or light grease.
In a large bowl, combine the chicken, olive oil, and all spices. Toss until the chicken is fully coated.
Add the sliced peppers, onion, and minced garlic to the bowl. Mix again so everything is evenly combined.
Spread the mixture out on the sheet pan in a single layer. Bake for 30–35 minutes until the chicken is cooked through and lightly browned.
Warm the tortillas, then fill with the chicken and vegetable mixture. Add toppings like lime juice, avocado, sour cream, cheese, and cilantro before serving.
Notes
Slice vegetables evenly so they cook at the same rate.