Step 1

Combine the squash, pepper, onion, garlic, water, salt, and sugar in a large soup pot. Bring to a boil, then cover and simmer for 35 minutes

Step 2

Using a hand-held immersion blender, purée the soup until silky smooth. (Alternatively, cool the soup slightly, then purée in a blender in batches, making sure to leave the hole in the lid open to allow the steam to escape.) Stir in the heavy cream and bring to a simmer. Mix in the thyme (or curry powder), then taste and adjust seasoning (depending on the sweetness of the vegetables, you may need a touch more sugar). Ladle the soup into bowls, drizzle with more cream if desired, and serve.

Step 3

Make-Ahead/Freezer-Friendly Instructions: The soup can be prepared up to 3 days in advance and stored in the refrigerator in an airtight container. It can also be frozen, without the cream, for up to 3 months. Defrost the soup in the refrigerator for 12 hours and then reheat it on the stovetop over medium heat until hot. Once heated through, add the cream and bring to a simmer before serving.