What lesson does Garvey teach Cole when he prepares the hot dog? Chapter 16

When Garvey challenges Cole to cook a hot dog for himself, Cole hurriedly cooks the hot dog over the fire and eats it. Garvey says that hot dog fulfilled its purpose in taking away Cole's hunger, but did nothing else.

Garvey then cooks a hot dog of his own. He roasts it carefully, then puts it on bread along with a slice of tomato, cheese, and ketchup. He pours a glass of water for each of the three and offers a toast of friendship before giving Cole and Edwin each a portion of his hot dog. Garvey is demonstrating that a simple meal with just a hot dog can become a feast if it's shared with friends.