Heat olive oil in a skillet over medium heat and add the diced onion. Sauté until it becomes translucent and fragrant, about 5 minutes, listening for a gentle sizzle.
1 pound ground beef or turkey
Add minced garlic to the skillet and cook for another minute until it releases a rich aroma. Stir frequently to prevent sticking.
1 pound ground beef or turkey
Transfer the sautéed onion and garlic to the slow cooker. Add ground meat and cook until browned, breaking it apart with a spoon as it cooks, about 5-7 minutes.
1 pound ground beef or turkey
Stir in the diced pumpkin, drained black beans, diced tomatoes, vegetable broth, cumin, smoked paprika, and cayenne pepper. Mix well to combine the spices evenly distributed.
1 pound ground beef or turkey
Cover the slow cooker with its lid and set to low. Let the chili simmer gently for about 4 hours, allowing the flavors to meld and the pumpkin to soften into a velvety, thick mixture.
Once cooked, open the lid and give the chili a gentle stir. Adjust seasoning if needed, and let it sit for a few minutes for the flavors to settle and thicken further.