In a mixing bowl, combine the minced garlic, grated Parmesan cheese, olive oil, chopped parsley, lemon juice, salt, and black pepper. Mix well until all ingredients are combined to form a marinade.

Place the chicken breasts in a resealable plastic bag or a shallow dish. Pour the marinade over the chicken, making sure each piece is well coated. Seal the bag or cover the dish and marinate in the refrigerator for at least 30 minutes, or up to 4 hours for more flavor.

Preheat the grill to medium-high heat. Lightly oil the grill grates to prevent sticking.

Remove the chicken from the marinade, allowing the excess marinade to drip off. Discard the leftover marinade.

Place the chicken breasts on the hot grill. Grill for about 6-7 minutes on one side until grill marks appear and the chicken easily releases from the grill.

Flip the chicken and continue grilling for an additional 5-7 minutes or until the internal temperature reaches 165°F (75°C).

Remove the chicken from the grill and let it rest for a few minutes. This helps retain moisture.

Slice and serve the Garlic Parmesan Grilled Chicken warm, garnished with extra parsley if desired.