A breakfast sandwich is a popular morning meal that typically consists of a combination of ingredients placed between two slices of bread, a bagel, or an English muffin. Common fillings include eggs, bacon, sausage, and cheese, making it a hearty option to start the day. Breakfast sandwiches can be customized to suit individual tastes, with variations that include vegetarian options or different types of bread. They are often enjoyed with condiments like ketchup or hot sauce and can be found in many cafes, diners, and fast-food restaurants, making them a convenient choice for busy mornings.