Add the squash, sweet potatoes, garlic, ginger and broth in the crockpot. Cook on high for 2 hours, until soft and cooked through
I do not have an immersion blender, so I transfer everything to my blender. If you have one, you can leave it all in your crockpot. Add the remaining seasons, butter and mascarpone cheese and puree until smooth. Adjust the seasonings to your taste level.
Serve immediately and enjoy!