6 tablespoons salted butter
▢4 medium yellow onions, thinly sliced
▢1 1/4 cups dry white wine, such as Pinot Grigio or Sauvignon Blanc
▢3 cloves garlic minced or grated
▢2 cups cremini or wild mushrooms, sliced
▢2 tablespoons fresh thyme leaves
▢2 tablespoons chopped fresh sage
▢1 teaspoon honey
▢6-8 cups low sodium chicken or vegetable broth
▢2 teaspoons Worcestershire sauce (or soy sauce)
▢2 bay leaves
▢kosher salt and black pepper
▢1/2 cup heavy cream
▢6 slices french bread
▢2 cups shredded Gruyère cheese
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Melt together the butter, onions, and honey in a large Dutch oven over medium-high heat. Cook, stirring occasionally until softened, about 10 minutes. At this point, you want to slowly add 3/4 cup of the wine, 1/4 cup at a time, until the wine cooks into the onions. Continue to cook another 10-15 minutes until you’ve used the 3/4 cup of wine and the onions are deeply caramelized.
- Add the garlic, mushrooms, thyme, and sage. Season with salt and pepper, cook another 3-4 minutes. Add the remaining 1/2 cup wine, the broth, Worcestershire sauce, bay leaves, and a pinch each of salt and pepper. Increase the heat to medium-high and return the soup to a simmer, simmer 10 minutes, then stir in the cream and cook another 5-10 minutes. Remove the bay leaves and discard. Season to taste with salt and pepper.
- Meanwhile, preheat the oven to 400 degrees F. Arrange the bread on a baking sheet and toast for 10-15 minutes, until very dry. Switch the oven to broil.
- Ladle the soup into oven safe bowls. Add a slice of bread to each, and top evenly with cheese. Place each soup bowl on a baking sheet and transfer to the oven, broil until bubbly and golden brown, 3 to 5 minutes. Top with fresh thyme. Eat!