01 - Preheat grill or grill pan to medium-high heat.
02 - In a small bowl, whisk together melted butter, minced garlic, chopped parsley, lemon zest, salt, and black pepper until well combined.
03 - Thread zucchini rounds onto skewers, leaving small gaps between pieces to ensure even heat circulation.
04 - Brush zucchini generously with half of the garlic butter mixture, ensuring even coating on all surfaces.
05 - Grill for 3-4 minutes per side, turning once, until zucchini is tender and shows light char marks.
06 - Remove skewers from heat and immediately brush with remaining garlic butter while hot.
07 - Sprinkle with grated Parmesan if desired and accompany with fresh lemon wedges.