Next time you make burgers... try putting the cheese inside!
Make the burger mix like you would normally (about a kilo of mince, 1x onion (preferably chopped), several slices of breadcrumbs, 1 or 2 eggs and a good squirt of brown sauce) but make a flatter burger than normal and lay a couple of slices of cheese in the middle, then put another thin burger on top to create a sandwhich type effect. Pinch the edges together and fold the edges back into the burger. Cook for about 12 minutes each side at about 180° and behold as they spray everywhere when you knife them (or don't knife them to avoid lots of mess).
It works with meatballs too but with burgers you do slices, balls you do cubes.