Creating a delicious Grilled Chicken Cordon Bleu Sandwich involves several straightforward steps. Here’s how to make it:

1. Prepare Chicken: Begin by seasoning the boneless chicken breasts with salt and pepper.

1. Preheat Grill or Skillet: Heat the grill or a skillet over medium-high heat and add a tablespoon of olive oil.

1. Cook Chicken: Place the chicken breasts on the grill or skillet. Cook for about 6-7 minutes on each side, or until they reach an internal temperature of 165°F (75°C).

1. Add Fillings: In the last couple of minutes of cooking, add two slices of Swiss cheese and two slices of ham on top of each chicken breast. Cover to melt the cheese.

1. Prepare Sandwich Rolls: While the chicken is cooking, spread Dijon mustard on the inside of each sandwich roll or slice of grilled bread.

1. Assemble Sandwich: Once the cheese has melted, remove the chicken from the heat. Place each chicken breast inside a sandwich roll.

1. Toast the Sandwiches: Spread butter on the outer side of the sandwich rolls. Place the sandwiches back on the grill or skillet and toast for an additional 2-3 minutes on each side until golden brown and crispy.

1. Slice and Serve: Remove the sandwiches from the heat and slice them in half for easy handling.

This simple yet effective method will surely yield an incredible Grilled Chicken Cordon Bleu Sandwich!