This hearty and nutritious mushroom soup features roasted mushrooms and barley for a satisfying meal. Start by roasting a mixture of mushrooms, such as portobello, button, and porcini, to enhance their flavors. In a separate pot, cook barley until tender. In a large saucepan, sauté onions, carrots, and celery until softened. Add the roasted mushrooms, cooked barley, vegetable broth, and herbs like thyme and rosemary. Simmer the soup until all the flavors meld together. The result is a deliciously thick and filling soup that is perfect for chilly days.