A B.L.T. is a popular sandwich that typically consists of three main ingredients: bacon, lettuce, and tomato. These ingredients are usually layered between two slices of bread, often toasted for added texture. The sandwich is known for its savory flavor and is commonly enjoyed as a lunch or snack option. The B.L.T. can be customized in various ways, such as adding mayonnaise or using different types of bread like sourdough or whole grain. It is a staple in many diners and cafes, celebrated for its simplicity and delicious combination of flavors.