A sandwich is a food item typically consisting of two slices of bread with various fillings in between. Common fillings include meats, cheeses, vegetables, and spreads like mayonnaise or mustard. Sandwiches can be served cold or hot and are popular for their convenience and versatility. There are many types of sandwiches, such as the club sandwich, grilled cheese, and submarine sandwich. They can be made with different types of bread, including white, whole grain, or rolls. Sandwiches are often enjoyed as a quick meal or snack and are a staple in many cultures around the world.