Sometimes purity is foresaken for indulgence. This sandwich is bananas delicious. The braising liquid is less about exact measurement and morabout feel. Leave a few inches of space below the top of the slow cooker and covering the roast —justin rashbaum
Sear the chuck roast after rubbing with olive oil and black pepper and sea salt. Add the beef broth, wine, worcestershire and soy sauce. Cook in slow cooker on high for 8 hours. Beef should be falling apart, not needing to be pulled.
Toast an English muffin. Spread truffle aoli on both halves. Add (from bottom): beef, onions, mozzarella, finely chopped sundried tomatoes
You can reduce the residual braising liquid a bit and use a side jus.