#### Instructions:

1. **Caramelize the Onions:**
– In a large pot or Dutch oven, melt the butter with the olive oil over medium heat.
– Add the thinly sliced onions and cook slowly, stirring occasionally, until the onions are caramelized and golden brown. This process can take about 30-40 minutes.

2. **Add Flavor:**
– Sprinkle sugar over the caramelized onions and stir for a minute.
– Pour in the white wine (if using) to deglaze the pot, scraping up any browned bits from the bottom.

3. **Simmer the Soup:**
– Add the beef broth and water to the pot. Season with salt and pepper to taste.
– Bring the soup to a simmer and let it cook for about 20-30 minutes to allow the flavors to meld together.

4. **Prepare the Cheesy Toast:**
– Preheat the broiler. Place baguette slices on a baking sheet and toast them lightly under the broiler.
– Sprinkle grated Gruyère cheese on top of each toast and return them to the broiler until the cheese is melted and bubbly.

5. **Serve:**
– Ladle the hot French Onion Soup into oven-safe bowls. Top each bowl with a cheesy toast.
– Garnish with fresh thyme or parsley before serving.

6. **Enjoy:**
– Serve the French Onion Soup hot and enjoy the rich, savory flavors with the gooey cheese-topped toasts.

This easy French Onion Soup recipe is perfect for a cozy night in and will surely warm you up with its comforting and delicious flavors. Bon appétit! 🥣🧀