Liver is lean, delicious and a nutritional powerhouse. It’s also among the least-expensive beef products at most markets, so it pays to get to know it better. While it used to be in the dinner rotation in many households, the popularity of liver has fallen so much that today many Americans don’t know what it tastes like and some supermarkets no longer carry it. Seek it out and you may be surprised by how quick, easy and tasty it is to cook. All you need is one pan and a few minutes.