it's a squash. cut in half lengthwise and scoop out seeds etc. steam it in the oven for twenty or so minutes (cause it's big), then continue cooking (roasting) with olive oil and seasonings, or steam for almost 45 and remove "meat", mash and whip with butter and nutmeg salt and pepper. yum
You can also cut into serving size "boats" and stuff them with anything you like from sausage and stuffing mix to chili to rice or bulgar wheat and aromatics and roast. Again the size says to me to par cook it with steam...(water in a covered casserole, squash on a rack)
you can also skin and seed it and cut into cubes or chunks and roast along side a chicken in the oven with other veg. or make soup...squash is versatile
