This popular English sandwich is likened to beef Wellington using bread rather than pastry.
A shooter's sandwich is prepared by filling a long, hollowed-out loaf of bread with cooked filet mignon steak, cooked mushrooms, salt, and pepper.
Typically the sandwich is weighted down overnight, which causes meat juices to soak into the bread.
[1] Other cuts of beef, such as rump steak, ribeye, and sirloin are also used to prepare the item.
It is now enjoyed both for at-home meals or as a portable food item when travelling.