Preheat Oven To 350 Degrees F (175 Degrees C). Open The Hoagie Rolls And Lay Out On A Baking Sheet. Heat Beef Consomme And Water In A Medium Saucepan Over Medium-High Heat To Make A Rich Beef Broth. Place The Roast Beef In The Broth And Warm For 3 Minutes. Arrange The Meat On The Hoagie Rolls And Top Each Roll With 2 Slices Of Provolone. Bake The Sandwiches In The Preheated Oven For 5 Minutes, Or Until The Cheese Just Begins To Melt. Serve The Sandwiches With Small Bowls Of The Warm Broth For Dipping.