# How to Make It:
01 - Arrange bread slices on a clean surface.
02 - Spread a thin, even layer of mayonnaise on one side of each bread slice.
03 - Optionally, spread a thin layer of Dijon mustard on the opposite side of two bread slices.
04 - Place 2 slices of cheese between two bread slices, ensuring mayonnaise sides face 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, cook another 3 to 4 minutes while pressing gently with spatula until bread is golden and cheese melts.
08 - Remove from skillet, let rest one minute, then slice and serve immediately.