Fresh Tomato Soup

      Yield: 4 Portionen
 
      6    Tomatoes; medium size or
      1    Onion; chopped
      2 c  Chicken broth
    1/2 ts Basil; dried
    1/2 ts Salt
      2 lb Italian plum tomatoes
      1    Celery; stalk, chopped
      1 tb Tomato paste
    1/4 ts Pepper; freshly ground
    1/2 c  Yogurt
 
Cut tomatoes into wedges and place in 1 1/2-quart saucepan with 
all ingredients except yogurt.  Simmer uncovered 30 minutes.
Strain to remove tomato skins and seeds.  Adjust seasonings.
Garnish with spoonfuls of yogurt.