Calling all grilled cheese lovers! This cheesy mushroom toastie is absolutely mouth-watering.
Heat the oven to 225 °C. Chop and fry the mushrooms in butter until soft and nicely browned. Fry the onion in butter and sugar until caramelised. Spread butter on the bread and add the Jarlsberg® cheese slices. Add the fried mushrooms and caramelised onion. Fry the toastie in a cast-iron pan with plenty of butter until golden. Top the toastie with chopped parsley and serve with truffle mayonnaise.