Baked corned beef (baked corned beef)

Instructions

1. Preheat the oven to 190 °C. Peel the potatoes and cut them into thin rounds. Thinly slice the onions.
2. Cook the potatoes for 8 minutes in boiling water, then drain them.
3. Oil an ovenproof dish and layer the potatoes, onions and corned beef cut into slices, seasoning lightly with salt and pepper.
4. Mix the milk, egg and mustard, pour over the dish and sprinkle with cheddar.
5. Bake for 35 to 40 minutes until the top is golden and the centre is piping hot.
6. Let it rest for 5 minutes before serving.