01 - If using wooden skewers, soak them in water for at least 20 minutes to prevent burning.
02 - Preheat the grill to medium-high heat (about 400°F).
03 - In a small saucepan over low heat, melt the butter. Add minced garlic and cook for 1 minute until fragrant. Remove from heat, stir in parsley, lemon zest, salt, and pepper.
04 - Thread zucchini rounds, bell pepper, and red onion alternately onto skewers.
05 - Brush skewers generously with half of the garlic butter.
06 - Place skewers on the grill. Cook 3–5 minutes per side, turning occasionally, until the vegetables are tender and charred in spots.
07 - Remove from grill and brush immediately with remaining garlic butter. Arrange on a serving platter with lemon wedges. Serve warm.