For an even richer flavor, consider using brown butter instead of olive oil to roast the squash. Garnish with a swirl of hazelnut creamer, a sprinkle of toasted hazelnuts, or a drizzle of high-quality olive oil for an elegant presentation. For a vegan option, use vegetable stock and substitute the hazelnut coffee creamer with a homemade cashew cream infused with hazelnut extract. Soup can be stored in the refrigerator for up to 3 days.