Thank you, Arturo, for posting. I've actually grown Waltham butternut squash in past. Truth is, I cooked them for someone else by halfing them, and then baking them in the oven and just putting butter in the hole. I'm not fond of them. But I've never tried them in a pumpkin pie type fashion. I know people do sweet potatoes that way. But I don't particularly like sweet potatoes either. I have grown sweet potatoes too, and find them easy to grow, and fun - - I just don't like their texture in my mouth.
If it has that same texture, I know I wouldn't like it. Pumpkin pie is smooth. And I'll keep in my a possible way to grow the squash for just a few to try.
And thanks for the info on the celery.