Fresh Tomato Soup

I had a bumper crop of tomatoes, so I used the recipe a lot:

1/2 cup chopped onion
1/4 cup butter
1/4 cup all-purpose four
2 cups water
6 medium tomatoes, peeled and diced
1 Tablespoon minced fresh parsley
1 1/2 teaspoons salt
1/2 teaspoon thyme
1 bay leaf
1/4 teaspoon pepper

Cook onion in butter until tender. Stir in flour to form a smooth paste. Gradually add water, stirring constantly (so flour doesn't make lumps) thickened. Add the tomatoes, parsley, salt, thyme, bay leaf, and pepper. Simmer until tomatoes are tender. Remove the bay leaf before serving, unless Lisa is eating with you. In that case, whoever gets the bay leaf in their bowl is lucky if their name is Lisa.