Preheat the oven to 400°F.
Dice the sweet potato into cubes. Toss with a drizzle of olive oil, and season lightly with salt and pepper. Spread on a baking sheet and roast for about 20-25 minutes until tender and slightly caramelized.
While the sweet potato roasts, finely dice the onion, bell pepper, and garlic.
Heat a non-stick skillet over medium heat with the remaining olive oil. Add the diced onions, bell pepper, and garlic, sautéing until softened.
Add the lean ground turkey to the skillet. Cook until the turkey is browned and fully cooked through, breaking it apart as it cooks.
Stir in the black beans, diced tomatoes, chili powder, cumin, and a pinch of salt and pepper. Let the mixture simmer for about 5-7 minutes so the flavors meld together.
Once the sweet potatoes are done, remove from the oven and top them with shredded cheddar cheese. Let the cheese melt slightly from the heat of the potatoes.
Serve the lean ground turkey chili alongside the cheesy roasted sweet potatoes, and enjoy your balanced, satisfying meal.