Add the lentils, sweet potatoes, onion, garlic, bell pepper, diced tomatoes, black beans, vegetable broth, chili powder, cumin, smoked paprika, salt, and black pepper to the slow cooker.
Stir everything together until the spices are evenly distributed.
Cover and cook on low for 7 to 8 hours.
Stir the chili once more before serving to check the thickness.
Ladle into bowls and top with cilantro and avocado slices.
Notes
The sweet potatoes soften and release a mild sweetness that balances the chili powder, so taste before adding extra salt at the end. Leftovers thicken more in the fridge, so add a splash of broth when reheating on the stove. This version holds up well for two days of lunches if you portion it into containers right after cooking.Course: Main Course
Cuisine: American
Equipment: Slow Cooker, Knife, Cutting Board