Baked macaroni casserole with corned beef, tomatoes, and cheese.

Steps

1. Boil macaroni and set aside.
2. In the same pan, put flaked corned beef, onion and tomatoes. Cook for a few minutes. Remove from heat.
3. Add macaroni, egg, milk, ketchup, salt, pepper and most of cheese.
4. Place in a greased dish with remaining cheese on top. Bake in a preheated oven until golden and set.