Leeks can be intimidating but they capable of making borning mashed potatoes and elevating them to something extraordinary. Usually harvested in the autumn months, they are easy to grow from seedlings and are ready six months after planting. Much like an onion, they form a bulb and a long bundle of leaves above the ground. The soil must be loose and well-drained.  The bulbs of the plant do not tolerate wet soil. As a very hearty vegetable, some varieties can survive during the early winter months, extending their harvest season. Most agree, prolonging harvest will intensify the flavor. Unlike its sister, the onion, leeks have a sweeter, milder flavor, and…