01 -
Place the chuck roast into a 5-6 quart slow cooker. Evenly sprinkle ranch dressing mix and au jus gravy mix over the meat. Add sliced butter, peperoncini peppers, and peperoncini juice on top.
02 -
Cover the slow cooker and cook on low for 8 hours or on high for 6 hours. Avoid lifting the lid during cooking to maintain tenderness.
03 -
Once cooked, shred the chuck roast using forks and remove any visible fat. This can be done directly in the slow cooker or separately.
04 -
Preheat the oven to 350°F (177°C). Lightly grease a 9x13-inch baking dish with non-stick spray.
05 -
Slice the Hawaiian rolls in half horizontally. Arrange the bottom halves evenly in the prepared baking dish. Layer 6 slices of provolone cheese over the bottom halves.
06 -
Evenly distribute the shredded meat over the cheese layer. Top the meat with ¼ cup sliced peperoncini peppers.
07 -
Place the top halves of the rolls on the meat and peppers. Add the remaining 6 slices of provolone cheese over the meat as well.
08 -
In a small bowl, melt 2 tablespoons butter and whisk in garlic salt and finely chopped parsley if using.
09 -
Brush the butter mixture evenly over the tops of the rolls. Cover the dish tightly with aluminum foil and bake for 15 minutes.
10 -
Remove the foil and continue baking for 2-3 minutes until tops are golden and cheese is melted. Serve warm.