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