01 - Preheat grill or grill pan to medium-high heat.
02 - Whisk together melted butter, minced garlic, parsley, lemon juice, salt, and black pepper in a small bowl until thoroughly combined.
03 - Thread zucchini rounds onto skewers, leaving small gaps between pieces for even heat circulation.
04 - Brush zucchini generously with garlic butter mixture, coating all sides completely.
05 - Place skewers on hot grill and cook for 4–5 minutes per side, turning once, until tender with golden grill marks. Baste with remaining garlic butter during cooking for enhanced flavor.
06 - Remove from grill and sprinkle with grated Parmesan cheese and additional chopped parsley if desired. Serve immediately.