Ingredients

  • 12 cup unsalted butter (1 stick)
  • 1 lb mushroom, thinly sliced
  • 1 large onion, minced
  • 3 tablespoons tomato paste
  • 5 cups beef stock (preferably homemade)
  • 12 cup sweet vermouth
  • salt & freshly ground black pepper
  • freshly grated parmesan cheese

Method

  • Melt butter in medium saucepan over medium-low heat.
  • Add mushrooms and onion and cook until onion is translucent, stirring occasionally,about 10 minutes.
  • Stir in tomato paste; add stock and vermouth and simmer 10 minutes to blend flavors.
  • Degrease soup, if necessary.
  • Season with salt and pepper.
  • Serve immediately, passing Parmesan separately.