Roasting the mushrooms before making the soup adds a depth of flavor to this recipe. Start by tossing sliced mushrooms with olive oil, salt, and pepper, then roast them in the oven until they are golden brown. In the meantime, sauté onions and garlic in a pot, then add the roasted mushrooms and vegetable broth. Use a food processor to blend the mixture until smooth. This roasted mushroom soup is rich, earthy, and perfect for chilly days.
