Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel the sweet potato and cut it into 1/2-inch cubes. Dice the chicken breast into bite-sized pieces.
In a small bowl, whisk together the tomato puree, apple cider vinegar, maple syrup, smoked paprika, garlic powder, sea salt, and black pepper to create the BBQ glaze.
Place the sweet potato cubes, diced chicken, sliced red bell pepper, and chopped red onion on the baking sheet.
Drizzle the olive oil over the ingredients and toss well to coat everything evenly.
Pour the BBQ glaze over the mixture and toss again until every piece is well-coated.
Spread the mixture in a single layer and roast for 20-25 minutes, or until the chicken is cooked through and the sweet potatoes are tender and slightly caramelized.
Remove from the oven and let rest for 2 minutes before serving.