Saute Sweet Potatoes: In a large skillet, heat 2 tablespoons oil over medium high heat until shimmery. Add the sweet potatoes and cook, stirring, for 4 minutes or until softened and starting to take on some color. Season lightly with salt and pepper while they cook. Transfer to a plate and set aside.
Saute Meat Mixture: In the same skillet, heat the remaining 1 tablespoon oil over medium high heat until shimmery. Add the onion, jalapeno, and turkey and season lightly with salt and pepper. Cook, stirring and breaking up the meat as it cooks, until the turkey is cooked through and no longer pink, about 5 minutes. Optional: Drain off some of the excess liquid/grease and return to the hot burner. (Tip: I do this by holding a lid on top and cracking it just a little while draining the liquid into a bowl.)
Add More Ingredients: Add the garlic, tomato paste, chili powder, cumin, paprika, and oregano (crush it in your hand first) to the skillet and stir to coat the meat mixture. Cook for only 1 minute to release the flavors of those ingredients.
Slow Cook: Transfer the meat/veggie mixture to the slow cooker. Stir in chicken broth, diced tomatoes, black beans, the cooked sweet potatoes, 3/4 teaspoon salt*, and 1/4 teaspoon pepper. Cover and cook for 6-8 hours on LOW or 3-4 hours on HIGH. Stir in the lime juice when done.
Serve: Taste and season with more salt or lime juice to your preference. Chili will thicken as it sits and cools slightly. Serve with your favorite chili toppings.
*Use 1 teaspoon salt if you used low sodium chicken broth.