Get Well, Good Knight

In their dark cave deep in the forest, three little dragons feel awful. Their foreheads are hot with fever, their noses are drip-drip-dripping, and their teeth are chat-chat-chattering. Riding clippety-clop, clippety-clop through the forest, their friend the Good Knight asks the old wizard for help. But when the dragons won't eat the wizard's scaly, snaily soup or his slimy, grimy soup, the Good Knight does not know what to do. Who can the Good Knight find to make a soup to help his little dragon friends feel better?