Add two-thirds of the cheese, the cooked gammon or ham and the mustard ... dish and pour the sauce over the top. Sprinkle with the remaining cheese. Bake for around 20 minutes, or until golden ...
Add the spinach with a splash of water and cook for 2 minutes, or until wilted. Remove from the heat, squeeze out any excess water and place on top of the ham. Break the egg on top of the spinach.