Preheat oven to 200C

Make 2 large burgers using burger maker or by hands.

Place burgers on the tray or baking dish and cook in the oven at 200C for about 10 min or until half cooked

Meanwhile slice mushrooms and onions and fry them slightly

Place fried onions and mushrooms on the top of burgers, top up with cheese

Cook for another 10-15 min until ready