PREHEAT the oven to 400°F and line a baking sheet with foil.
SCRUB the sweet potatoes clean and pat dry. Prick with a fork in several places, place on a baking sheet, and bake for 45 to 60 minutes until soft.
MAKE the chili while the potatoes bake. Heat olive oil in a pot over medium heat and add onion, garlic, and celery. Cook until the onions are translucent
ADD the bell peppers and jalapeño and cook for one minute. Then add the walnuts, chili powder, paprika, cumin, and nutritional yeast. Stir constantly for 30 seconds.
STIR in the tomatoes, tomato paste, and broth. Bring to a boil, then lower to simmer for 20 minutes.
ADD the black beans and simmer for another 10 minutes.
TURN OFF the heat and stir in lime juice, coconut aminos, cilantro, and salt.
CUT baked sweet potatoes in half and stuff them with the chili. Garnish with sliced avocado, scallions, and/or jalapeño as desired and serve the remaining chili on the side.
ENJOY!