Dressing:
7 oz. crumbled blue cheese
2/3 cup mayonnaise
1/3 cup buttermilk, well shaken
1/4 cup red wine vinegar
3 tablespoons sour cream
2 tablespoons oil
1 1/2 tablespoons sugar
1/2 teaspoon minced garlic
1/4 teaspoon freshly ground pepper
Salad:
1 large head iceberg lettuce or 1 1/2 heads if small
6 oz. crumbled blue cheese
3 diced seeded, plum tomatoes