Place the mushrooms on a baking tray, drizzle with oil and seasoning then place under a preheated grill for 5 minutes, turning once half way through.
Meanwhile, poach the eggs in boiling water for 2-3 minutes.
Place the mushrooms stalk side up on the baking tray, top with the ham then the poached egg. Sprinkle over the cheese and grill for 2 minutes until golden brown.
If serving vulnerable groups, elderly people, toddlers, pregnant women and people who are unwell, cook eggs until the whites and yolks are solid.
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.