Preheat the oven to 350 degrees F (175 degrees C).

Open hoagie rolls and lay them out on a baking sheet.

Heat beef consommé and water in a medium saucepan over medium-high heat to make a rich beef broth.

Place roast beef in broth and warm for 3 minutes.

Arrange meat on hoagie rolls and top each roll with 2 slices of provolone.

Bake sandwiches in the preheated oven until cheese melts, about 5 minutes.

Serve sandwiches with small bowls of warm broth for dipping.