Peel and chop butternut squash into cubes about 1" square.
Chop onion and mince garlic.
In a large crockpot, add squash, onions, garlic, thyme, and broth.
Add seasonings and use a spoon to stir them in.
Set temperature to low and cook for 4-6 hours, stirring occasionally. The soup is done when the squash is very fork tender
Using an immersion blender, puree the ingredients until smooth and all chunks have disappeared. If you don't have an immersion blender, just pour the mixture into a regular blender [in 2 batches, if necessary] and blend until smooth.
Serve with fresh black pepper and a crusty baguette.