Preheat oven to 200ºC. Spray two large baking trays with olive oil spray. Spread wedges in a single layer on one tray and spray lightly with oil.
Bake for 20-25 minutes until lightly browned and cooked through.
Meanwhile, whisk egg and milk together. Place flour and breadcrumbs in two separate bowls. Coat fish in flour, followed by the egg and then the breadcrumbs. Place on the second tray and spray lightly with oil.
Bake for 10-15 minutes until tender and golden.