Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the sweet potato and bell peppers into uniform bite-sized pieces to ensure even roasting.
Toss the vegetables on the sheet with half the olive oil, chili powder, cumin, salt, and pepper.
Roast for 20-25 minutes until the sweet potatoes are tender and have developed a caramelized exterior.
While the vegetables roast, season the chicken breast with the remaining oil, chili powder, garlic powder, salt, and pepper.
Heat a grill or grill pan over medium-high heat and cook the chicken for 6-7 minutes per side until the internal temperature reaches 165°F.
Squeeze fresh lime juice over the grilled chicken and serve immediately alongside the roasted vegetable medley.