Preheat the oven to 400°F (200°C) and line a large baking sheet with foil or parchment for easy cleanup.
Trim and slice 1.5 lb chicken breasts into thin strips and slice 3 bell peppers and 1 small red onion into thin strips.
In a large mixing bowl combine 3 tbsp olive oil, 2 tbsp lime juice, 1 tbsp honey, 1 tsp garlic powder, 2 tsp chili powder, 0.5–1 tsp smoked paprika, 1 tsp ground cumin, 3/4 tsp dried oregano, 1/2 tsp black pepper, 1/2 tsp sea salt, and 1/4 tsp cayenne (optional); whisk to make the marinade.
Add the sliced chicken, peppers, and onion to the bowl and toss thoroughly to coat everything evenly in the marinade.
Spread the chicken and vegetables in a single layer on the prepared baking sheet, minimizing overlap so pieces cook evenly.
Bake for about 15 minutes, until the chicken reaches an internal temperature of 165°F (74°C) and vegetables are tender-crisp.
If desired, warm tortillas wrapped in foil in the oven during the last few minutes of cooking.
Remove from the oven and let rest about 5 minutes; blot any excess liquid from the pan with a paper towel if needed, then serve with preferred toppings.