Much of the success of this soup depends on the stock that you are using, and stock varies tremendously in its taste. Depending on your stock, you may need to bump up the flavor with some beef bouillon (we recommend Better Than Bouillon brand).
Ingredients:
6 large red or yellow onions (about 3 pounds)
4 tablespoons extra virgin olive oil
2 tablespoons butter
1 teaspoon sugar
Kosher salt
2 cloves garlic, minced
8 cups beef stock, chicken stock, or a combination of the two
1/2 cup dry vermouth or dry white wine
2 bay leaves
1 tablespoon fresh thyme leaves, a few sprigs of fresh thyme, OR 1/2 teaspoon dried thyme