Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Combine first 10 ingredients in a Dutch oven; bring to a boil over medium heat. Reduce heat, and simmer 30 minutes. Remove and discard bay leaf., Combine cornstarch and water, stirring until smooth; stir mixture into soup. Bring to a boil; boil, stirring constantly, 1 minute. Remove from heat., Add shredded cheese and whipping cream, stirring until cheese melts. Top each serving with toasted rye bread cubes.
chicken broth, beef, sauerkraut, carrot, onion, garlic, thyme, ground white pepper, tarragon, bay leaf, cornstarch, water, Swiss cheese, whipping cream, Rye bread