French Onion Soup

French onion soup is an onion and beef broth based soup traditionally served with croutons and cheese as toppings. Although ancient in origin, this dish underwent a resurgence of popularity in the 1960s due to the growth of French cooking in the United States.
Onion soups have been popular at least as far back as Roman times. They were, throughout history, seen as food for the poor people, as onions were plentiful and easy to grow.