Reishi mushrooms are some of the most widely used medicinal mushrooms in the world. Their scientific name is Ganoderma lucidum. In Chinese medicine, reishi mushrooms are known as ling zhi, which means spiritual plant as the Chinese believe the herb is healing for the spirit. The most popular method for consuming them is to drink a tea made from them. The tea can be prepared by simmering the dried mushroom in water for 3 hours. Adding reishis to soup is also a good option. As with tea preparation, it should simmer in your soup for 2-3 hours to really bring out the flavor and earthy aroma. If you decide to use them in a prepared dish, use sparingly and as an accent. It is regarded by many Japanese chefs as a good way to deepen the umami flavor in a dish.