With their brilliant orange-colored flesh, winter squashes are the kings of winter vegetables. Whether roasted, pan-sautéed, cooked in soups or stews, or puréed, they’re delicately flavorful and imbue a lovely sweetness.
This recipe starts with a white wine reduction which enhances the wonderful natural sweetness, but also brings a bit of tang to the soup.
Topped with a swirl of the citrus-mint pesto, this soup has bright flavors and a silky-smooth texture, and is also gorgeous to look at.
Note: The soup can be made up to 3 days ahead and reheated just before serving. It may need to be thinned with additional water, as the squash will absorb the liquids as it stands. Freezes well for up to 1 month.
Place all of the ingredients in the bowl of a food processor and process until very smooth, for 1-2 minutes, scraping the sides of the bowl once or twice. Transfer to a small bowl and set aside.
Heat a large heavy-bottomed pot over medium-high heat. Add the olive oil and onion and sauté for 5-6 minutes until golden, stirring from time to time. Add the garlic and wine. Stir well and continue to sauté for 3-4 minutes, until the wine has evaporated and glazed the onions. Add the squash chunks, vegetable stock, water, salt, and pepper. Bring the soup to a boil and then simmer, covered, for 30-35 minutes, until the squash is very tender.
Add the orange juice and purée the soup with an immersion blender or food processor until silky-smooth. Thin the soup with water to the desired consistency. Adjust the seasoning, if needed. Remove from heat and set aside.
Ladle the soup into soup bowls. Place a spoonful of the pesto in the center of each bowl and serve immediately.