Heat the oil in a frying pan and cook the mushrooms for 5 – 8 minutes, until softened and golden. Add the ham to the pan and cook for another couple of minutes.
Heat a grill to high. Season the eggs and pour into the pan, cook for 5 minutes over a medium heat, stirring a little. Grate the cheese, scatter over and place under the grill for another few minutes, until golden and cooked through.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.