French Onion Monkey Bread

Ingredients (15)

• 8 tablespoons butter, divided
• 1 tablespoon olive oil
• 2 pounds yellow onions (about 4 medium), thinly sliced
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1/2 cup dry red wine or sherry
• 1/2 cup beef stock
• 2 teaspoons Worcestershire sauce
• 3 garlic cloves, minced
• 2 tablespoons minced fresh parsley
• 1 tablespoon minced fresh thyme
• 3 cans (10.2 ounces each) large refrigerated buttermilk biscuits
• 1/2 cup grated Parmesan cheese
• 2 cups shredded Gruyere or Swiss cheese
• Minced parsley and grated Parmesan, for garnish, optional