Where is Dijon placed when added to a #10 sandwich?

When Dijon mustard is added to a #10 sandwich at Jimmy John's, it is placed between the meats. This placement is typical in sandwich-making, where condiments like mustard are usually layered to enhance flavor and ensure that they are well-incorporated into each bite. By situating the Dijon between the meats, it not only adds a tangy flavor but also helps to keep the sandwich cohesive, preventing the other ingredients from sliding around. This strategic placement aids in achieving a balanced taste experience, as the mustard interacts directly with the meats rather than being isolated on one end or the other of the sandwich.