French Onion Soup Recipe

This french onion soup recipe is made in my kitchen but tasle like it came direct from the Paris.This authentic french onion soup is the best way to use those little small onions you don't know how to use.

Ingredients:
2 tablespoons butter
3 pounds onions halved and thinly sliced (see notes)
Salt and freshly ground black pepper
1/4 cup balsamic vinegar
6 cups chicken broth
2 cups beef broth (see notes)
2 teaspoons minced fresh thyme or 1/2 teaspoon dried thyme
2 bay leaves
1 baguette sliced and toasted (see notes)
8 slices Swiss cheese or 2 cups shredded Swiss cheese
1/4 cup chopped fresh parsley for garnish, optional

Instructions:
In a large Dutch oven over medium heat, melt butter. Add onions and 1/2 teaspoon salt. Cook until the onions are starting to darken and caramelize, about 30 minutes.
Stir in vinegar and scrape up the brown bits from the bottom of the pot. Add chicken broth, beef broth, thyme, and bay leaves. Simmer until reduced slightly, about 20 minutes. Season to taste salt and pepper.
Preheat oven broiler on HIGH. Place broiler-safe soup bowls on a rimmed baking sheet. Divide the soup evenly among the 8 bowls (about 1 cup each). Top each bowl with 1 or 2 baguette slices and cover with one slice of cheese (or 1/4 cup shredded).

Broil until the cheese is hot and bubbly, about 3 to 5 minutes. Remove from the oven and garnish with parsley, if desired.