1-Start by heating your vegetable oil in: Start by heating your vegetable oil in a large skillet over medium high heat. Once the oil is hot, add your chuck roast and brown it on both sides. This step takes about three to four minutes per side. Do not skip this step. Browning the meat adds a layer of flavor that makes a real difference in the final dish.
2-Transfer your browned chuck roast to the: Transfer your browned chuck roast to the slow cooker. Pour all three cans of soup over the top. That is the two cans of French Onion Soup and the one can of Beef Consomme. Give it a quick stir to combine and then put the lid on. Cook on high for four hours or on low for eight to ten hours. Either way works perfectly and the meat will be incredibly tender either way.
3-Once the cooking time is done, carefully: Once the cooking time is done, carefully remove the chuck roast from the slow cooker and transfer it to a large bowl. Use two forks to shred the meat, pulling it apart into thin strips. Remove and discard any large pieces of fat as you go.
4-While you are shredding the meat, pour: While you are shredding the meat, pour the juices from the slow cooker into a medium saucepan on the stovetop. Bring it to a simmer over medium heat. If you want a thinner au jus, just let it simmer and reduce by about half. It will be rich and flavorful and perfect for dipping. If you prefer a thicker and creamier au jus, whisk together one tablespoon of cornstarch and one tablespoon of cold water in a small bowl. Add that mixture to the simmering broth and stir. Let it cook for a couple of minutes until it reaches the consistency you want.
5-Pile the shredded beef onto your hoagie: Pile the shredded beef onto your hoagie rolls. Layer one or two slices of provolone cheese on top of each sandwich. Place the open sandwiches on a baking sheet and put them under the broiler on low broil. Watch them closely. You want the cheese to melt and get a little bubbly and golden brown on top. This usually takes two to three minutes. Pull them out, serve them hot with a small bowl of au jus on the side, and get ready for your family to lose their minds.