Have you tried shredding it, then drying the shreds. Run the shreds through a food processor until you get flour. You store it and use it like wheat flour. Or any other kind of flour. Can mix it with other flours too.
Pretty ingenious ...
https://www.amodernhomestead.com/how-to-make-squash-flour/
Pretty ingenious ...
https://www.amodernhomestead.com/how-to-make-squash-flour/