Crawfish boil soup. When we do a crawfish boil we use potatoes, onions, garlic, corn on the cob, andouille, lemons, and, of course crawfish in a spicy cooking broth. We always have some of everything left. So, I make soup using the potatoes, onion, and garlic, puree them with some chicken broth, stir in sliced andouille and the corn cut off the cob, and freeze it for later use. We freeze some crawfish separately to stir into the soup after it's reheated.