Preheat oven to 325F.
Prepare Dutch oven by slicing onions and layering them on the bottom of your Dutch oven.
Unwrap the meat and season it with salt, garlic, and pepper, placing it on top of the onion layer in the Dutch oven.
Follow directions for Johnny’s French Dip and pour it over the meat.
Add the lid to the Dutch oven and place it in a 325F degree oven.
Bake until meat is falling apart and is tender.
Serve Johnny’s French Dip sandwiches on a toasted bun and top with cheese. Warm the cheese until melted.
Serve au jus from the pot in a dipping bowl to dip your sandwich.
For extra flavor, add onions from the pot onto the sandwich.