Ingredients
Method
Prepare the Soup
- In a large pot, heat olive oil over medium heat. Add the sliced onions and cook, stirring frequently, until they are caramelized and golden brown, about 25 minutes.
- Add the sliced mushrooms to the pot and cook for an additional 10 minutes until they are soft.
- Pour in the vegetable broth and add thyme, salt, and pepper. Bring to a simmer and cook for 10 minutes.
- Stir in the heavy cream and balsamic vinegar, and blend the soup until smooth using an immersion blender or regular blender.
Serve the Soup
- Ladle the soup into bowls and top with grated Gruyère cheese.
- Broil the bowls in the oven for 2-3 minutes until the cheese is bubbly and golden.
- Garnish with chopped parsley before serving.
Nutrition
Notes
For a vegetarian version, ensure the broth is vegetable-based. This soup can be made ahead and reheated before serving.
