It is not fully cooked, just cooked until soft enough to remove from the rind. You can do it in the oven or in the microwave or even in boiling water. Then mashed or cut into chunks and frozen in serving sized packages. See link below for details.

Dave

Here is a link that might be useful: NCHFP- How to freeze winter squash

I fully cook mine then run through a strainer to remove fibers then freeze the puree. However, that's a personal choice as it's then ready for pies, quick breads and soups.

I can chunks, so that I don't take up too much freezer space.

Carol

Thank you both for your responses. I think I am gong to to do both. Chunks and puree.