Onion soup with Gruyère cheese.
Onion soup with Gruyère cheese. List of ingredients: 4 big onions, cut into thin slices. 3 tablespoons of butter 1 tablespoon of olive oil 4 pieces of garlic, finely chopped 1 small spoon of sugar 1 tablespoon of regular flour 6 cups of beef broth, or if you prefer, vegetable broth. 1 cup of white ...