sister hall's tomato bisque

My friend Erin served this soup as part of a Relief Society meeting several years ago when we both lived in St. Louis. It is a delicious, sophisticated soup- not a soup that should be eaten out of a plastic bowl with a plastic spoon like we did that night.

sister hall's tomato bisque (my friend Erin in MO)
1 leek
1 stalk celery
4 cloves garlic, pressed
3 tablespoons butter
Add above ingredients to a large saucepan and cook over medium heat until vegetables are tender, about 10 minutes.
Add to the saucepan the following:
3 cups sliced fresh mushrooms
2 (16 ounce) cans diced tomatoes
3 cups chicken broth
Simmer for 30 minutes. Puree the mixture until very fine and quite smooth. Return the mixture to the saucepan and add the following:
1/2 cup cream
1/2 teaspoon pepper
2 teaspoons dried dill weed
salt to taste