1Clean and slice the button mushrooms.
Finely chop the onion and garlic cloves.
In a large pot, heat the olive oil over medium heat.
Add the chopped onion and garlic to the pot and sauté until the onion becomes translucent.
Add the sliced mushrooms to the pot and cook until they are soft and have released their moisture.
Pour in the vegetable broth and bring the mixture to a boil.
Reduce the heat and let it simmer for about 15 minutes.
Use an immersion blender to puree the soup until smooth.
Stir in the heavy cream and season with salt and black pepper to taste.
Let the soup simmer for another 5 minutes.
Serve hot, garnished with fresh parsley.