Start by peeling and dicing the sweet potatoes, chopping the onion and bell peppers, and mincing the garlic.
Drain and rinse the black beans. Prepping everything ahead ensures a smooth cooking process.
If you want to add a deeper flavor to your chili, briefly sauté the onions, bell peppers, and garlic. In a small skillet, heat a tablespoon of olive oil over medium heat.Sauté the onion for about 5 minutes until it turns translucent, then add the garlic and bell peppers. Cook for another 3 minutes. Finally, stir in the chili powder, cumin, and cinnamon, letting the spices toast for a minute.
Transfer the sautéed vegetables (if you sautéed them) into the crockpot. Add the sweet potatoes, black beans, diced tomatoes, and any remaining spices.
Cover and set your crockpot to Low for 6–8 hours or High for 3–4 hours.
For a thicker chili, use the canned tomato liquid, but if you prefer a more stew-like consistency, add vegetable broth or water.
Once the cooking time is up, give the chili a taste and adjust the seasoning. Add salt, pepper, or a bit more cinnamon for a hint of warmth. For a spicier kick, consider stirring in some crushed red pepper flakes.