(The Best Years in Life) This hearty soup features barley, a grain which has a slightly sweet and mild taste. Barley is a good source of fiber and contains the minerals iron and selenium. The pearl barley used in this recipe cooks in about 40 minutes and slowly absorbs the flavor of the carrots, thyme and oregano. Use almost any type of mushroom in this dish, including the button variety found in virtually all food markets. This is a great dish to experiment with different vegetables and whole grains to make the perfect healthful one-pot meal.