A Nail Soup

One day, a hungry man knocked on a woman’s door and asked for food. She said, “I don’t have any food for you.”
“That’s OK,” the man replied. “I have a nail. I can make us some soup.”
The woman let him in. the man put his nail into a pot of water and said, “It’s always tastier when I put in some celery and salt.” The woman wanted some nail soup. So she got him some celery and salt.
Next the man said, “Onions and potatoes make the soup cook faster.” The woman was very hungry. So she put some onions and potatoes into the pot too. The soup boiled and boiled.
The woman said, “It smells delicious.”
The man smiled and said, “Yes, and I made it with just a nail!”