In large saucepan or Dutch oven, melt butter over medium heat. Cook coleslaw mix, onion, celery and caraway seed in butter 2 to 3 minutes, stirring frequently, until vegetables are crisp-tender.
Stir in remaining ingredients. Heat to boiling; reduce heat. Cover; simmer 5 to 10 minutes, stirring occasionally, until potatoes are tender and soup is thoroughly heated.