Step-by-step cooking method Peel the onions and cut into slices with a thickness of 1 cm. Separate the onion rings, taking care not to break them. Mix the beaten eggs with the milk in a deep dish. Mix the breadcrumbs with the salt on a flat dish. Dip each onion ring in the egg and breadcrumbs, and then repeat, dipping them in the egg and breadcrumbs again (double coating). Place the rings on a tray, taking care not to damage the coating. Spray the onion rings with oil and cook in the fryer without stacking them on top of each other.