Posted this as a comment somewhere else, for someone who was thinking of freezing brussels sprouts. Cautioned her against it, but recommended soup. I was in the supermarket last week, even though it is still quite warm for September, longing for fresh sprouts.
Buttery and creamy-smooth, top with something sweet and crunchy – parsnip crisps, parmesan biscuits, shredded caramelised fried onion, or toasted almonds.
I like nutmeg in the soup, but a cream sherry flavouring or a dash of maple syrup and lemon peel works well too.