Heat a large skillet over high heat and lightly spray with oil.
Add meat and cook, breaking it up until white, about 5 minutes. Transfer to the crock pot.
Add oil to the skillet, then onions, garlic, sauté about 3 - 4 minutes; add cumin and sauté another minute. Transfer to crock pot.
Add beans, pumpkin puree, green chilis, broth, chili powder, oregano, and bay leaves. Cover and cook on high for 4 hours or low for 8 hours.
Remove bay leaves and adjust seasoning to taste before serving.