Put the sandwiches onto a baking tray and heat in the oven until the cheese is melted. Strain the gravy into two heated bowls, and place the onions on top of the cheese in the sandwich.

You don’t need a special gadget to make a superb cheese toastie – a simple frying ... Heat a large frying pan over a medium heat. Put the sandwich in the pan and fry for 3 minutes on one ...