It is in my head, but some thing like this:
PUT THE FOLLOWING INTO A BIG STOCK POT:
4 to 5 cups peeled chestnuts;
not quite twice as much really really good homemade chicken stock(dark stock because when you made it you browned the various chicken pieces first);
4 to 6 fresh celery stalks cut in pieces (everything gets pureed so don't worry about chopping);
1 onion cut in pieces;
bring everything to a boil and then lower to a medium simmer for 20 or 30 minutes. Let it cool and then puree it in a food processor until completely smooth Put it back in the pot, add a half cup Maderia (port type wine)salt and pepper to taste and simmer for haslf an hour - it too thick just add chicken stock.
I garnish with a fresh sage leaf that I fry until crisp, and then a slice of fresh chestnut. Sometimes I add some ground sausage that I fry until crisp and sprinkle lightly over it. Let me know when you try it.