Place the ground turkey, onions, garlic, spices, and sea salt in a 4-quart crockpot. Use a wooden spoon to break up the turkey and mix everything together.Cut the ends off the sweet potatoes and trim off any unsightly bits. Then, cut them into quarters lengthwise. Cut the quarters crosswise into chunks about 1½ inches in size.Place the sweet potatoes over the top of the turkey mixture.Place the whole tomatoes and tomato paste in a blender and blend until combined but still chunky. Pour the tomato mixture over the top of the sweet potatoes and turn the crockpot to low.Cook for 8-10 hours, or until the sweet potatoes are tender. Taste the chili and add salt to your taste.Serve with any and all toppings you desire.