French onion soup

Name: French onion soup
Ingredients: 3 tablespoons Unsalted butter; 2 pounds Yellow or Spanish Onions peeled, trimmed and sliced thinly; 1 clove of minced garlic; 1 pinch kosher salt; freshly ground black pepper; 2 teaspoons All purpose flour; 1 cup Dry white wine or Madeira or Sherry; Herb sachet: (2 sprigs Italian parsley, 2 sprigs thyme, 8 peppercorns and 1 bay leaf, tied together in a cheesecloth); 2 quarts Chicken stock; 1 Mini French baguette; 2 cups Gruyere or Swiss cheese coarsely grated; 4 to 6 sprigs Parsley finely chopped