Thanks so much 1066 xjane
No need to peel. Apparently the breeder of Buttercup Burgess loved them best with the 'button' cut out, seeds scooped out and the cavity filled with sausage meat, then baked in the oven.
They have a delicious flavour of their own, one of the best of all the winter squashes. Therefore I love them cooked as plainly as possible. Gently steamed bite sized chunks or fried in olive oil with garlic or baked to accompany a sunday roast (they need only 30-40 minutes in the oven).