# How to Make It:
01 - Arrange bread slices on a clean surface.
02 - Evenly spread mayonnaise on one side of each bread slice.
03 - If desired, spread Dijon mustard on the opposite side of two bread slices.
04 - Place two cheese slices between two bread slices with mayonnaise sides facing outward. Repeat for second sandwich.
05 - Preheat a nonstick skillet over medium-low heat.
06 - Place sandwiches mayo-side down in skillet; cook 3 to 4 minutes until golden brown.
07 - Flip sandwiches and cook other side 3 to 4 minutes, pressing gently with spatula until bread is golden and cheese melts.
08 - Remove sandwiches from skillet, let rest 1 minute, then slice and serve immediately.