Creating the Cheesy Chicken Garlic Bread Sandwich is simple with these clear steps:

1. Prepare Ingredients: Gather all the necessary ingredients and have them ready. Pre-cooked chicken is ideal.
2. Preheat the Pan: Heat a skillet over medium heat.
3. Combine Chicken and Sauce: In a bowl, mix the shredded chicken with mayonnaise, mustard, salt, and pepper until well combined.
4. Assemble Sandwiches: Place one slice of garlic bread in the skillet. Layer the chicken mixture on top, then cover with shredded cheese.
5. Top with Bread: Place the second slice of garlic bread on top of the cheese.
6. Grill the Sandwich: Cook on one side for about 3-5 minutes until golden brown. Carefully flip and grill the other side until the cheese is melted and the bread is crispy.
7. Serve Hot: Remove from the skillet and let cool for a minute. Slice in half for easier handling, if desired.

These straightforward steps ensure a delicious outcome every time.