Savory Vegetarian Stout French Onion Soup

Follow our step-by-step guide on how to make Savory Vegetarian Stout French Onion Soup.

1. Step 1

   Start by tossing the cubed portobello mushrooms with flour in a bowl until they are well coated. This will help create a nice texture when cooked. Heat the olive oil in a large skillet over medium heat, then add the coated mushrooms. Sauté them for about 5 to 10 minutes until they are beautifully browned and fragrant.

2. Step 2

   In a large stockpot, combine the cubed potatoes, sliced carrots, sliced onion, minced garlic, and fresh rosemary. Once the mushrooms are ready, add them to the pot. Pour in the stout beer, vegetable broth, tomato paste, Worcestershire sauce, salt, and pepper. Stir everything together, cover the pot, and let it cook over medium-high heat for about an hour, or until the vegetables are tender and the flavors meld together.

3. Step 3

   To thicken the soup, whisk together the cold water and cornstarch in a small bowl until smooth. Stir this mixture into the soup and cook for an additional 3 minutes until it thickens up nicely.

4. Step 4

   While the soup is thickening, set your oven rack about 5 inches from the heat source and preheat the broiler. Arrange the slices of French bread on a baking sheet and sprinkle the shredded Swiss cheese generously over each slice. Broil the bread in the preheated oven for about 1 minute, or until the cheese is melted and golden brown.

5. Step 5

   To serve, ladle the soup into bowls using a slotted ladle, then top each bowl with a slice of the cheesy bread. Pour some of the broth over the bread until it is nicely saturated. Enjoy your comforting bowl of vegetarian stout French onion soup!