What is the main purpose of bread in a sandwich?

The main purpose of bread in a sandwich is to provide bulk. Bread serves as the foundational component that holds together the fillings, which can include a variety of ingredients such as meats, cheeses, vegetables, and spreads. By adding bulk, bread not only creates a satisfying texture but also contributes to the overall structure and stability of the sandwich. It enables the sandwich to be easily handled and consumed.

While flavor, presentation, and nutrition are relevant aspects of a sandwich, they are secondary to the primary function of the bread as a carrier. The choice of bread can indeed enhance the flavor profile, contribute aesthetically to the presentation, and provide some nutritional value, but the essential role it plays is to create the overall bulk that makes a sandwich recognizable and enjoyable as a meal option.