you can just chuck it in oven 180 degrees ish, I think for 40 mins or so, Tortoise.
But the very best thing to do is put them under a high grill, allow skins to blacken, turn till blackened on all sides, about half hour I think, but just do it till much of skin is black. allow to cool, peel and de-seed over a bowl to catch juices.
Then puree with the steamed/boiled squash. Add vegetable/chicken stock (made slightly weaker than instructions) to make it thick soup consistency, add a couple of big spoonsful of cream cheese/creme fraiche (obv depends on how much soup you've got, but you want it to go creamy) and serve with bread.
Roasted asparagus, prob 25 mins at 180 degrees? Just check them every now and then, should still have the slightest bite to them. Or, to be honest, just boil them till they're a bit floppy, they'll still be delicious.
Vinaigrette (sorry if you know this!) olive oil 3 parts, balsamic vinaigre 1 part, a little finely chopped garlic, a bit of honey, sea salt, shake in a jar.