Preheat the oven to 400F/200C and line a baking tray with a non-stick mat. Peel the zucchini and slice it into chunky wedges.
Tip the panko breadcrumbs onto a small plate and stir in the garlic powder, onion powder and salt. Pour the egg white (or vegan alternative) into another dish.
Dip each zucchini wedge into the egg white/vegan alternative dish then dip it into the breadcrumbs, making sure all sides are totally covered. Place the coated zucchini wedge on the lined baking tray and repeat with the remaining wedges.
Bake the coated wedges in the preheated oven for 25 minutes, until the breadcrumbs are crispy and golden brown. Enjoy straight away with your favorite dip while hot.