Peel the sweet potato and cut into small half-inch cubes; finely dice the yellow onion and mince the garlic.
Heat the extra virgin olive oil in a medium pot over medium-high heat.
Add the diced onion and sauté for 3-4 minutes until translucent and fragrant.
Add the ground turkey to the pot, breaking it up with a wooden spoon, and cook until browned and no longer pink.
Stir in the minced garlic, chili powder, ground cumin, sea salt, and black pepper, coating the turkey evenly in the spices.
Add the cubed sweet potatoes, rinsed black beans, tomato sauce, and water to the pot.
Bring the mixture to a boil, then reduce the heat to low and cover with a lid.
Simmer for 15-20 minutes, or until the sweet potatoes are fork-tender and the chili has thickened.
Remove from heat and let sit for 5 minutes before serving to allow the flavors to meld.