Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the chicken breast into bite-sized strips and chop the bell peppers, zucchini, and red onion into uniform pieces.
In a large bowl, whisk together the olive oil, chili powder, cumin, garlic powder, sea salt, and black pepper.
Add the chicken and vegetables to the bowl, tossing thoroughly until every piece is evenly coated in the spice mixture.
Spread the chicken and vegetable mixture in a single layer on the prepared sheet pan, ensuring they aren't overcrowded so they roast rather than steam.
Roast in the oven for 18-20 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
While the pan is roasting, rinse and drain the black beans.
Remove the pan from the oven, toss in the black beans to warm them through with the residual heat, and drizzle the entire dish with fresh lime juice.
Serve immediately topped with sliced avocado for a dose of healthy fats.