In a small bowl, stir together the Italian seasoning, garlic powder, onion powder, salt, black pepper and thyme. Set aside
Cut any large chunks of fat off the roast. Next, cut roast into 2 or 3 large chunks. Season beef with Kosher salt.
Heat the oil in a large skillet over medium high heat. Add the roast to the pan and sear meat on all sides until golden brown so it develops a nice crust.
Place beef in slow cooker. Sprinkle seasoning mixture on top of the beef
Add pepperoncini peppers and juice, giardiniera without juice, and beef broth.
Cover the slow cooker and cook on HIGH for 5-6 hours or LOW for 8-10 hours, or until meat shreds easily with a fork. Shred the beef. Keep shredded beef in the slow cooker and allow it to cook for 30 -45 minutes on low with all the juices.
To serve, split the hoagie buns in half and toast on a baking sheet in the oven at 350 degrees for 5 minutes (if desired). Fill the buns with shredded Italian beef. Top with provolone, pepperoncini and Giardiniera as desired. Serve hot.
Notes
This recipe uses a homemade seasoning. However, if you're tight on time, you may also use