Heat vegetable oil in a large dutch oven or stock pot over medium heat. Sauté garlic for one minute. Add chopped onion and sauté for 4-5 minutes or until onion becomes translucent. Add beans, pumpkin, chiles, cumin, salt and chicken stock and cook for 30 minutes or until stock has reduced and chili thickens. Add pork and half and half and cook for another 10 minutes or until pumpkin becomes tender and pork is warmed through. Add kale leaves and cook for another 5-10 minutes. Serve with corn chips or cornbread and shredded cheddar cheese.