The comfort foods we grew up with don't deserve their bad reputation. From cereal and hamburgers to mac and cheese and fried chicken, America's favorite dishes can actually be part of a balanced diet with some thoughtful modifications. Breakfast becomes a nutritional powerhouse when you add fresh fruit to cereal, use high-protein milk, or mix in fiber-rich options. Even the humble peanut butter and jelly sandwich – which University of Michigan researchers found adds more years to your life t...