My Gramp used to have his roasts dry, bless him....
For when I'm in a hurry, Walls micro-sausages in-between 2 slices of toast, with ketchup - fucking lovely.
One that I can't be arsed to make, but usually buy when I see it, is tuna nicoise in a ciabbata roll - the combination of boiled-egg, tuna, olives, capers....want one now.
First one - always say no to micro-anything.
Second one - sounds superb.