Sear the chuck roast in a hot skillet with butter for 2-3 minutes per side before adding to the crock pot to develop a flavorful crust that enhances the overall depth of the sandwich.

Distribute the pepperoncini and roasted red peppers evenly throughout the crock pot rather than on top, so the liquid infuses the meat uniformly for consistent flavor in every bite.

Lightly butter and toast the crusty rolls under the broiler just before serving to prevent them from becoming soggy while adding a subtle richness that complements the tender beef.

After shredding the meat, strain the au jus and simmer it in a saucepan for 5-10 minutes to concentrate the flavors and create a richer, more luxurious dipping sauce for the sandwiches.

Place the provolone cheese on warm rolls and let the residual heat from the hot beef melt it gently rather than placing it in the crock pot, preserving its creamy texture and subtle flavor.