I found this recipe on the internet and tried it because it's quick and easy. It tasted great and we all loved it. The cream cheese on the bottom is a little funny, but you could always leave it off. I used a packet of Pioneer Au Jus mix that made 2 cups, and it was plenty.
4 hoagie rolls
1 pkg. au jus gravy mix
1 lb. deli Italian roast beef (ask your deli to do thin slices)
8 slices provolone cheese