2 tablespoons French red vinegar
2 tablespoons finely chopped fresh shallots
1/2 teaspoon salt
1/4 teaspoon pepper
2 teaspoons Dijon style mustard
6 tablespoons olive oil
1 tablespoon lemon juice
1 tablespoon heavy cream
(may substitute yogurt or omit entirely)

Using a blender, add first 5 ingredients and, with blender running, add oil. Continue blending. Add in lemon juice and then the optional cream or yogurt.