Preheat oven to 375F.
In a large bowl, add the oil, chili powder, cumin, garlic powder, paprika, salt, oregano, black pepper, and cayenne (if using). Stir until well combined.
Add veggie slices and chicken strips to the bowl and mix until they are well coated with the oil/spice mixture.
Place the chicken and veggies on a baking sheet in an even later.
Bake for 25-30 minutes, or until the chicken is fully cooked. Once the chicken is finished cooking, you can turn your oven to broil and place the pan close to the broiler for 2-5 minutes. This step is optional, but I like it because it browns the chicken and adds color to the veggies.
Remove the pan from the oven. Sprinkle with lime juice if using, then serve.