Drippy French Dip Sandwiches

INGREDIENTS

• 2 tablespoons dry sherry
• 1 teaspoon ground oregano
• 1 can beef stock
• 1 small boneless rib loin roast (4 to 5 pounds)
• 5 cloves garlic, minced
• 1 teaspoon ground thyme
• 3 tablespoons freshly ground black pepper
• 1 packet French onion soup mix
• 8 slices provolone cheese, optional
• 1 tablespoon soy sauce
• Butter, softened, for toasting
• 1 can beef consomme
• 8 crusty deli rolls
• 2 tablespoons kosher salt
• 2 large onions, halved and sliced
• 2 tablespoons Worcestershire