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 fully combined.
03 - Thread zucchini rounds onto skewers, leaving small gaps between pieces to ensure even cooking and proper heat circulation.
04 - Brush zucchini generously with half of the garlic butter mixture, ensuring each round is evenly coated.
05 - Place skewers on the hot grill and cook for 3–4 minutes per side, turning once, until zucchini becomes tender and develops light char marks.
06 - Remove skewers from heat and immediately brush with remaining garlic butter while still hot for maximum flavor absorption.
07 - Sprinkle with grated Parmesan cheese if desired and arrange on serving platter with lemon wedges on the side.