Step 1

Cook the Chicken:Cook chicken using your preferred method (grill, boil, or bake).

Step 2

Shred or dice the cooked chicken.

Step 3

Prepare Chicken Salad:In a bowl, mix the shredded chicken with ½ cup mayonnaise, ¼ cup Greek yogurt (optional), ½ cup finely chopped celery, ¼ cup diced red onion, and ¼ cup diced bell pepper.

Step 4

Season with ½ teaspoon salt and ¼ teaspoon black pepper. Stir until well combined.

Step 5

Assemble the Sandwich:Spread the chicken salad mixture on one slice of bread.

Step 6

Top with ½ cup shredded cheddar cheese, ½ cup shredded Swiss cheese, and optionally ¼ cup shredded Monterey Jack cheese.

Step 7

Place another slice of bread on top.

Step 8

Grill the Sandwich:Butter the outside of the bread slices or brush with olive oil.

Step 9

Heat a skillet over medium heat.

Step 10

Grill the sandwich for 3-4 minutes per side, or until the bread is golden brown and the cheese is melted.