Spread with butter and loads of mustard. Pile on the onions and slice the steak before loading onto the sandwich. Put on the top half of toasted bread and dunk into more mustard while you eat.

The steak was tender and cheesy, the bread was fresh and fluffy, and the peppers and onions inside were perfectly cooked.

Cover with dry rub to just coat each side of the steak, then add a pinch of salt ... You can cut off the crusty ends of bread to ensure an easier bite, if you like. Slice the baguette in half ...