A deli sandwich is a type of sandwich typically made with sliced meats, cheeses, and various toppings, served between two slices of bread. Common ingredients include turkey, ham, salami, and cheddar cheese, along with condiments like mustard and mayonnaise. Deli sandwiches are popular for their convenience and variety, making them a favorite choice for lunch. These sandwiches are often found in delicatessens, which specialize in cured meats and other gourmet foods. They can be customized to suit individual tastes, with options for different types of bread, such as rye or sourdough, and a range of fresh vegetables like lettuce and tomato.