Preheat oven to 350 degrees.
Rub roast with olive oil and sprinkle with ½ spices.
Sear all sides in a large skillet over medium-high heat.
Place in a baking dish with some beef broth in the bottom. Cover with aluminum foil.
Bake 1 ½ hours checking periodically to make sure beef broth hasn't evaporated. Add more as needed.
Remove from oven and let cool. Slice thin.
Add beef, sauce from bottom of baking dish, peppers, garlic and onions to a large pot or dutch oven. Fill with beef broth making sure to cover.
Bring to boil then stir in remaining spices and bay leaves.
Turn down heat and simmer for an hour.
Add slices of cheese to top half of buns. Place buns on baking sheet in oven until toasted.
Ladle beef, onions, peppers and au jus onto other side of bun.
Add mustard or any other condiments.