3 tbsp unsalted butter

1 medium yellow onion, finely chopped

2 ribs celery, chopped (¼-inch pieces)

2 cloves garlic, minced

¼ cup all-purpose flour

4½ cups chicken broth

1 lb deli-sliced corned beef, chopped/shredded

14 oz sauerkraut, drained

1 tsp caraway seeds

½ cup Thousand Island dressing

2 bay leaves

1 cup heavy cream

2 cups shredded Swiss cheese, divided

2 slices rye bread, cubed

1 tbsp olive oil

2 tbsp fresh parsley, chopped

Salt to taste