1 egg
1 ounce Roquefort cheese
juice of half a lemon
1/2 teaspoon salt
1/4 teaspoon mustard
1 clove garlic
1/2 cup olive oil
1/2 cup cream (sour cream or heavy sweet cream)
Having all of the ingredients at room temperature, place the first six in the container of a blender. Whirl together at low speed and then very slowly pour in the oil. Add the cream and whirl until blended. The dressing should be fairly thick, almost like mayonnaise.