Vegetarian Stout French Onion Soup

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Recipe by: Matthieu Duquette

"I love Irish stout stew and French onion soup. Plus my wife is a vegetarian. So I came up with this infusion that is, in my opinion, amazing! Portobello mushrooms replace cubed beef, and it is all topped off with a Swiss cheese-crusted slice of artisan bread, French onion-soup style. Serve with a frosty stout and enjoy! Happy St. Patrick's Day!"

Directions

Prep
20 m
Cook
1 h 10 m
Ready In
1 h 30 m

Toss mushrooms and flour together in a bowl until coated.
Heat olive oil in a large skillet over medium heat; cook and stir coated mushrooms until browned, 5 to 10 minutes.
Combine potatoes, carrots, onion, garlic, and rosemary in a large stockpot; top with cooked mushrooms. Stir beer, vegetable broth, tomato paste, Worcestershire sauce, salt, and pepper into vegetable mixture. Cover stockpot and cook over medium-high heat until vegetables are tender and soup flavors have blended, about 1 hour.
Whisk water and cornstarch together in a bowl until dissolved; stir into soup until thickened, about 3 minutes.
Set oven rack about 5 inches from the heat source and preheat the oven's broiler.
Arrange bread slices on a baking sheet and sprinkle Swiss cheese over each slice.
Broil bread in the preheated oven until cheese is melted and golden, about 1 minute.
Ladle soup into bowls using a slotted ladle; top each with a bread slice. Ladle broth over bread until saturated.