Lightly oil the inside of the crockpot to prevent sticking, then add diced onion and minced garlic, spreading them evenly across the base.
Add roasted, chopped bell peppers into the crockpot, distributing them with the onion and garlic.
Spoon in the pumpkin puree, smoothing it out so it covers the vegetables slightly, creating a vibrant orange layer.
Pour in the drained black beans and diced tomatoes along with their juices, mixing gently to combine.
Sprinkle chili powder, smoked paprika, and cumin evenly over the ingredients, then stir gently to distribute the spices.
Pour the vegetable broth into the crockpot, ensuring all ingredients are partially submerged.
Cover the crockpot with the lid, set it to low, and let it cook for about 8 hours, the scent filling your home with warm, smoky notes.
Once the cooking time is up, lift the lid and reveal a thick, hearty chili with a vibrant orange hue and tender beans.
Stir gently to blend the flavors, then taste and season with salt and pepper as desired.
Serve the pumpkin chili hot, garnished with fresh herbs or a squeeze of lime if desired, and enjoy its comforting, spicy warmth.