Prepare the vegetables by washing and drying them thoroughly. Cut the onions and zucchini into 1-inch chunks. Soak bamboo skewers in cold water for 30 minutes prior to grilling to prevent them from burning.
In a mixing bowl, combine the vegetables with avocado oil, salt, pepper, and garlic powder. Toss well to ensure the vegetables are evenly coated.
Thread the prepared vegetables onto skewers, alternating for even cooking and presentation.
Preheat the grill to 350°F. Place the skewers on the grill and cook for 15 minutes, flipping every 5 minutes, until the vegetables are slightly charred and cooked to your desired tenderness.
Notes
Bamboo Skewers: If using bamboo skewers, soak them in cold water for at least 30 minutes before grilling to prevent burning.Vegetables: Feel free to customize the skewers with your favorite vegetables!Storage: Allow skewers to cool completely before storing. Remove vegetables from the skewers and place them in an airtight container. Refrigerate for up to 4 days.