Making Chicken Parmesan Grilled Cheese is simple! Just follow these easy steps:

1. Prepare the Chicken: If not already done, cook and shred or slice the chicken breast. Season with salt and pepper.
2. Heat the Marinara: In a small saucepan, warm the marinara sauce over low heat until heated through.
3. Mix Cheeses: In a bowl, combine the shredded mozzarella cheese and grated Parmesan cheese. Set aside.
4. Butter the Bread: Spread butter on one side of each slice of bread to ensure a golden, crispy crust.
5. Assemble the Sandwich: On the non-buttered side of one slice of bread, layer the chicken, half of the cheese mixture, and warmed marinara sauce. Sprinkle with fresh basil (if using). Top with the remaining cheese and finish with the second slice of bread, buttered side facing up.
6. Grill the Sandwich: Heat a skillet over medium heat. Place the sandwich in the skillet and cook until the bottom is golden brown, about 4-5 minutes.
7. Flip and Cook: Carefully flip the sandwich and grill the other side until golden and the cheese has melted, about another 4-5 minutes.
8. Remove and Cool: Once cooked, remove the sandwich from the skillet and let it cool for a minute before slicing.

These simple steps will guide you in creating a Chicken Parmesan Grilled Cheese that is not only delectable but also memorable!