Preheat the oven to 180°C fan bake.

TOPPING: Whisk the butter, Worcestershire sauce, salt, both mustards, cayenne and eggs together in a bowl, then stir in the cheddar.

ROLLS: Cut a small slice off the top half of each roll (the topping will fall off if spooned onto a round top), then slice the rolls in half and place the bottom halves side by side in the baking dish. Top each bottom half with a little cheese, then a spoonful of onion jam. Top with the ham, then the remaining cheese. Add the top halves of the rolls and spoon on the topping.

Bake for about 10 minutes, or until the topping is golden and bubbling and the ham is very hot, turning the tray for even browning. Serve immediately.

Caramelised Onions 

INGREDIENTS
2 tablespoons olive oil
1 tablespoon butter
3 large brown onions, sliced 1cm thick
2 cloves garlic, crushed
2 teaspoons finely
chopped thyme
sea salt and ground pepper
1 tablespoon brown sugar
2 tablespoons balsamic vinegar

METHOD

Heat the oil and butter in a frying pan and add the onions, garlic and thyme. Season generously and cook for 20 minutes, stirring occasionally, until softened. Add the sugar and vinegar and continue to cook until deeply golden and glossy.