Savory Longhorn Onion Soup Recipe with a Cheesy Twist

Ingredients

• 4 large longhorn onions, thinly sliced
• 2 tablespoons unsalted butter
• 1 tablespoon olive oil
• 4 cups beef or vegetable stock
• 1 cup dry white wine (optional, can substitute with additional broth)
• 1 teaspoon salt
• ½ teaspoon black pepper
• 1 tablespoon fresh thyme leaves (or 1 teaspoon dried thyme)
• 4 slices of crusty French baguette
• 1 cup grated Gruyère cheese (or Swiss cheese)
• ½ cup grated Parmesan cheese