I thought I would give you a few pics to show you all the steps.
You will need the following ingredients:
1/2 cup unsalted butter
4 onions, sliced
2 garlic cloves, chopped
2 bay leaves
2 fresh thyme sprigs
Kosher salt and freshly ground black pepper
1 cup red wine, about 1/2 bottle
3 heaping tablespoons all-purpose flour
2 quarts beef broth
1 baguette, sliced
1/2 pound grated Gruyere
Melt the stick of butter in a large pot over medium heat. Add the onions, garlic, bay leaves, thyme, and salt and pepper and cook until the onions are very soft and caramelized, about 25 minutes.
Dust the onions with the flour and give them a stir. Turn the heat down to medium low so the flour doesn't burn (I forgot to take a photo of this step), and cook for 10 minutes to cook out the raw flour taste. Now add the beef broth, bring the soup back to a simmer, and cook for 10 minutes. Season, to taste, with salt and pepper.
When you're ready to eat, preheat the broiler.
Ladle the soup into bowls, top each with 2 slices of bread and top with cheese. Put the bowls into the oven to toast the bread and melt the cheese.
Final product = Yummy!