Serve this hearty soup with good crusty bread and a glass of wine for a warm meal on a chilly evening. Feel free to omit ham and use vegetable broth for a vegetarian option. Or top with crumbled bacon or sauteed pancetta instead of the chopped ham.
NOTE: The heavy cream is simply a matter of taste. I prefer the herb and squash flavors without the mellowness of cream, but it does add an appealing richness that may please some around your table. Feel free to pass a little pitcher of cream at the table for anyone who wants to add a drizzle.