1/2 cup chopped onion
1/2 cup sliced celery
2 tablespoons butter
1 cup chicken broth
1/2 teaspoon baking soda
2 tablespoons cornstarch
2 tablespoons water
3/4 cup sauerkraut, rinsed and drained
2 cups half-and-half cream
2 cups chopped cooked corned beef
1 cup shredded Swiss cheese
Salt and pepper to taste
Rye croutons, optional