Step 1

Coat a large oval slow cooker with cooking spray. Evenly place one of the sliced onions in the bottom of the slow cooker; add chuck roast pieces on top of onion.

Step 2

In a small bowl, combine basil, oregano, garlic powder, salt and pepper; evenly sprinkle over meat.

Step 3

In a second small bowl, add wine, vinegar and Beef Base; stir until base is dissolved and pour over meat. Place bay leaf in slow cooker; top with second sliced onion. Cover and cook on high for 8 hours, or until meat is fork tender.

Step 4

Remove meat from slow cooker; reserve juice in slow cooker; trim fat and shred meat with fork. Discard bay leaf.

Step 5

Place meat back into slow cooker with juice and set on warm. Serve on rolls and spoon juice over meat. Top sandwiches with sliced smoked provolone cheese, and place under broiler to melt cheese, if desired.