Place slow cooker liner in slow cooker, if using
add pumpkin puree, brown sugar, garlic, onion, ginger, cumin, and turmeric to slow cooker and stir to combine
add stock and mix well to fully combine
cover and cook on low for 6-8 hours (or 3-4 on high)
to serve, add salt or pepper if needed (I don't generally need any, but it is a personal preference)
when adding pumpkin soup to bowl, add two tablespoon or so half and half (or coconut cream to keep it dairy free) to each bowl.