Start by butterflying the chicken breasts. Carefully slice them horizontally, but not all the way through, to create a pocket for the stuffing.

Gently pound the chicken with a meat mallet to even out the thickness. This will help it cook more evenly.

Season both sides of the chicken with olive oil, garlic powder, paprika, salt, and pepper. Be sure to rub it in well for maximum flavor.

In a mixing bowl, combine mozzarella cheese, cream cheese, spinach, sun-dried tomatoes, garlic, and Italian seasoning. Stir until everything is well-mixed.

If you’re using optional ingredients like bacon or mushrooms, now’s the time to add them into the stuffing mixture. The combination of these fillings will give your chicken a rich, savory kick.

Carefully spoon the stuffing mixture into the pocket of each chicken breast. Don’t overstuff, as you want the filling to stay inside while grilling.

Secure the opening with toothpicks or kitchen twine to ensure the stuffing doesn’t spill out while cooking.

Preheat your grill to medium-high heat. Once it’s hot, place the stuffed chicken breasts on the grill.

Grill each side for 6-7 minutes, flipping once. Use a meat thermometer to check the internal temperature—it should reach 165°F (75°C) for perfectly cooked chicken.

If you prefer a smoky flavor, consider grilling over indirect heat for a few minutes to finish cooking without drying out the chicken.

Once cooked through, remove the toothpicks or twine and let the chicken rest for a few minutes before serving.

Slice into the chicken to reveal the cheesy, flavorful stuffing inside—your taste buds are in for a treat!