French onion soup au jus melt | Recipe | Bounded by Buns

Ingredients

• 5 Vidalia onions or yellow sweet onions, sliced (about 2.5 pounds)
• 2 tablespoons butter
• 1 teaspoon salt
• 1 cup white wine
• 32 ounces beef broth
• 1 fresh thyme sprig
• 1 bay leaf
• 2 parsley sprigs
• 1/2 teaspoon ground black pepper
• a splash of sherry wine
• 1 French-style bread rolls
• 1/4 cup caramelized onions (from above)
• 1/4 to 1/2 cup French onion soup broth (from above)
• 2 to 3 ounces Gruyere cheese, shredded
• 1/2 tablespoon butter