Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel and cube the sweet potato into half-inch pieces, then toss them on the baking sheet with 1 teaspoon of olive oil, sea salt, and black pepper.
Roast the sweet potatoes for 15 minutes while you prepare the chicken.
Season the chicken breast with chili powder and cumin, then place it on the baking sheet alongside the partially roasted potatoes.
Return the pan to the oven and roast for another 12 to 15 minutes until the chicken reaches an internal temperature of 165°F and potatoes are tender.
While roasting, rinse and drain the black beans and dice the bell pepper and red onion.
Slice the chicken into strips or bite-sized pieces once it has rested for a few minutes.
Assemble the bowl by combining the roasted chicken, sweet potatoes, black beans, peppers, and onions.
Drizzle with the remaining teaspoon of olive oil and lime juice, then garnish with fresh cilantro and sliced avocado.