Roast Beef with Au jus

2-3 Lbs. oven roast
2 cans beef broth (about 4 cups)
2 pkgs Lipton Onion Soup mix
French hoagie or sub rolls (whatever bread you like to do)
Swiss cheese slices

Put oven roast in a crock pot. Add beef broth and soup mix. Cook on LOW for 7-8 hours. Shred roast with a fork, then return the shredded beef to the crock pot for a few more minutes (to absorb more of that juicy goodness). Slice open the bread and place a good amount of beef on one side (scoop out some of the bread first if you don't like it really bread-y). Place a slice or two of Swiss cheese over the shredded beef and broil for a minute or so until cheese starts to bubble and brown a little. Remove from broiler and serve. Use a ladle to scoop out some of the juice from the crock pot and serve as au jus.