When I make this I don't puree it, though you could if you like a smooth texture better.  I personally like the texture of the very tender broccoli swimming around in a thick broth.  Mmmm!

1-3 TBLS cooking oil or butter
1 bunch scallions (or 1 onion), chopped
2-3 cups broccoli florets (bite size pieces)
2-4 cups chicken broth
1 buttercup squash, roasted and flesh mashed

On medium, sauté scallion in butter until tender.  Add broccoli, squash, broth, salt and pepper to taste.  Simmer until broccoli is very tender.  Check seasonings and add optional cream, milk, coconut milk, etc.