Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Peel the sweet potato and cut it into 1-inch cubes.
Toss the sweet potato cubes with half of the olive oil, salt, and pepper on the prepared baking sheet.
Roast the sweet potatoes for 25-30 minutes, tossing halfway through, until they are tender and caramelized.
While the potatoes roast, season the chicken breast with the remaining olive oil, garlic powder, smoked paprika, salt, and pepper.
Heat a grill or grill pan over medium-high heat and cook the chicken for 6-7 minutes per side, or until the internal temperature reaches 165°F.
Place a steamer basket over a pot of boiling water and steam the broccoli florets for 4-5 minutes until they are bright green and tender-crisp.
Remove the chicken from the grill and let it rest for 3 minutes before slicing.
Serve the sliced chicken alongside the roasted sweet potatoes and steamed broccoli for a balanced, clean lunch.