1 - go to your local grocery store - go to deli counter - ask for one pound of roast beef, sandwich sliced, and half pound of swiss cheese, also sandwich sliced.
2 - Purchase 4 to 6 hoagie roll buns, from the same area as the deli usually, or bakery if you prefer.
3 - When preparing, slice roll in half - pile roast beef as desired on lower half of roll - cover with swiss cheese - microwave for 60 seconds.
4 - While microwaving, take top half of roll, cover in mayo as desired
5 - Remove bottom half from microwave - cheese should be fully melted - assemble sandwich - cut into two portions as desired.