Combine Green Beans, Potatoes, Stock, Vinegar, Honey, Garlic, Caraway, Salt And Pepper. Bring To A Boil And Simmer For 20 Minutes. Meanwhile Saute Onion In Butter For 5 Minutes. Add Celery, Saute For 10 Minutes. Add Paprika And Saute For 1 Minute. Add Onion Mixture To The Stock Mixture. Mix Cornstarch With Water. Add To Soup. Simmer For 1 Minute. Stir In Yogurt And Serve.