01 - Preheat grill or grill pan to medium-high heat, approximately 400°F.
02 - In a small mixing bowl, whisk together melted butter, minced garlic, chopped parsley, lemon zest, salt, and black pepper until fully combined.
03 - Thread zucchini rounds onto skewers, leaving approximately ¼ inch space between each piece to ensure even heat circulation and cooking.
04 - Using a basting brush, coat zucchini rounds generously with half of the prepared garlic butter mixture, ensuring even coverage on all surfaces.
05 - Place skewers on the preheated grill and cook for 3-4 minutes per side, turning once, until zucchini becomes tender and develops light char marks.
06 - Remove skewers from grill and immediately brush with remaining garlic butter while hot. Sprinkle with Parmesan cheese if desired and serve with fresh lemon wedges.