Sometimes it's okay to cheat a little!
1 can condensed French Onion soup
1/2 lb deli roast beef
1/3 cup water
4 slices Provolone cheese
4 hoagie rolls
~In microwave or on the stovetop heat soup, beef, and water until heated through.
~Broil buns for 1 minute with cheese on bottom slice until melted.
~Use slotted spoon to scoop beef onto buns; use extra soup for dipping.
(This is even better if you saute some peppers and onions to add to the sandwich!)