Preheat the oven to 400°F (200°C) and prepare a baking sheet lined with parchment paper or foil.
Scrub the sweet potatoes under cool water, pat dry, and pierce several times with a fork.
Rub the skins of the sweet potatoes with olive oil and sprinkle with kosher salt and black pepper.
Arrange the seasoned sweet potatoes on the baking sheet and bake for 45–60 minutes.
Dice the yellow onion and red bell pepper, then mince the jalapeño and garlic.
Combine chili powder, cumin, smoked paprika, oregano, coriander, cayenne, kosher salt, and black pepper in a bowl.
Heat olive oil in a large pot over medium heat, sauté the diced onion and bell pepper for 5–7 minutes.
Add minced jalapeño and garlic to the pot and cook for an additional 1–2 minutes.
Cook ground turkey in the pot for 5–7 minutes until browned, stirring occasionally.
Stir in tomato paste and the spice mixture, cooking for another 1–2 minutes.
Add the canned tomatoes, black beans, kidney beans, and broth, bringing the mixture to a boil.
Reduce heat and simmer the chili partially covered for 20–25 minutes.
Combine diced avocados, lime juice, red onion, cilantro, and jalapeño in a bowl, season lightly.
When the sweet potatoes are cool, slice them lengthwise without cutting through completely.
Fluff the insides of the sweet potatoes with a fork, season with salt and pepper, and fill with chili.
Add toppings such as cheese, Greek yogurt, and avocado mixture to the chili filled sweet potatoes.
Garnish with cilantro and green onions, and serve with lime wedges on the side.