01 - Preheat grill or grill pan to medium-high heat.
02 - In a small bowl, whisk together melted butter, minced garlic, parsley, lemon zest, salt, and pepper until fully combined.
03 - Thread zucchini rounds onto skewers, spacing pieces evenly to promote uniform cooking.
04 - Brush zucchini generously with half of the garlic butter mixture, coating all surfaces.
05 - Grill skewers for 3-4 minutes per side, turning once, until tender-crisp with light char marks.
06 - Remove from heat and immediately brush with remaining garlic butter while hot.
07 - Sprinkle with Parmesan cheese if desired and arrange with fresh lemon wedges.