Creating the Grilled Chicken Panini Sandwich is a breeze with these simple steps:

1. Preheat your grill or panini press: Set it to medium-high heat to ensure even cooking.

2. Prepare the Chicken: Season the boneless chicken breasts with olive oil, Italian seasoning, salt, and pepper.

3. Grill the Chicken: Place the chicken on the grill or in the panini press. Cook for 6-7 minutes on each side, or until the internal temperature reaches 165°F (75°C).

4. Let it Rest: Once cooked, remove the chicken from the grill and let it rest for a few minutes before slicing it thinly.

5. Assemble the Panini: Take two slices of ciabatta bread. Layer one slice with sliced grilled chicken, mozzarella cheese, tomato slices, and fresh spinach.

6. Top with Bread: Place the second slice of bread on top of the assembled ingredients.

7. Grill the Panini: Brush the outside of the sandwich with a little olive oil. Place the sandwich on the grill or panini press. Grill for about 3-5 minutes, pressing down gently until the bread is golden brown and the cheese is melted.

8. Slice and Serve: Once grilled, remove the panini from the heat. Slice it in half and drizzle with balsamic glaze if desired.

9. Repeat: If you’re making more sandwiches, repeat the process for the remaining ingredients.

10. Enjoy: Serve your delicious Grilled Chicken Panini Sandwich warm, with a side of chips or a fresh salad.