Preheat your oven to 400°F (200°C).
Slice the bell peppers into thin strips and place them on one side of a parchment-lined baking sheet.
Drizzle the peppers with olive oil and season with a pinch of sea salt and black pepper.
Place the chicken breast in a small baking dish and season both sides with garlic powder, sea salt, and black pepper.
Pour the mild salsa and rinsed black beans over the chicken breast, spreading them evenly.
Place both the baking dish and the sheet pan of peppers into the oven.
Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the peppers are tender.
Remove from the oven and let the chicken rest for 5 minutes to keep it juicy.
Slice the chicken and serve alongside the roasted peppers.
Garnish with fresh avocado slices, chopped cilantro, and a bright squeeze of lime juice.