Halloween trick-or-treating and parties are quite different these days in comparison to when I was growing up. For starters it was colder this time of year as I was in Pennsylvania then instead of Florida. It would be such a drag when mom insisted we wear a coat because of the chill. Kids would always complain that our costumes couldn't be seen - very important back in the day when you were a kid!
Add the pancetta, leek, garlic and mushroom mixture, the cream, parsley, tarragon, salt and pepper. Simmer, uncovered, for 5 minutes or until reduced and thickened.
Serve on plates or in bowls with potatoes or steamed rice.