I like to use salt, pepper and rosemary when roasting my squash. Once I've scooped tender squash into a pot with broth I'll add autumnal spices such as cinnamon, cloves and star anise! I enjoy a sweeter squash soup, if you'd like a more savory version you could experiment with curry, chili powder, oregano, etc! For sweet and spicy, add a pinch of cayenne pepper.