Start by washing all your vegetables thoroughly. Cut the bell pepper into 1 1/2-inch pieces, slice the zucchini into 1/4-inch rounds, and separate the broccoli and cauliflower florets into bite-sized pieces. Halve the cherry tomatoes and cut the red onion into 1-inch pieces, ensuring the layers remain separated.
In a large mixing bowl, combine all the prepared vegetables. Drizzle with 2 tablespoons of extra virgin olive oil, then sprinkle with garlic powder, sea salt, and freshly ground black pepper. Toss everything together until the veggies are evenly coated.
Preheat your air fryer to 400°F (200°C) for about 5 minutes. This ensures that your vegetables start cooking immediately when placed inside.
Carefully place the seasoned vegetables in the air fryer basket. Make sure they are spread out evenly for optimal air circulation. If necessary, work in batches to avoid overcrowding.
Air fry the vegetables for about 12-15 minutes, shaking the basket halfway through to promote even cooking. Keep an eye on them towards the end to avoid overcooking.
Once the vegetables are golden and slightly crispy, remove them from the air fryer and transfer to a serving dish. Enjoy your Air-Fryer Vegetables as a side dish, topping for salads, or even as a snack!