Heat the olive oil in a medium pot over medium-high heat.
Add the ground turkey, diced red onion, and diced bell pepper to the pot.
Cook until the turkey is fully browned and the vegetables have softened, breaking the meat into small crumbles.
Stir in the cubed sweet potato, chili powder, cumin, garlic powder, sea salt, and black pepper until the ingredients are well coated.
Pour in the tomato puree, rinsed black beans, and water.
Bring the mixture to a gentle boil, then reduce the heat to low and cover the pot with a lid.
Simmer for 20 to 25 minutes, or until the sweet potatoes are fork-tender and the chili has thickened.
Serve hot in a bowl, optionally garnished with fresh cilantro or a squeeze of lime.