Place walnuts and sugar in a skillet over medium heat, stirring constantly until the sugar dissolves into a light brown liquid and coats the walnuts. Remove walnuts from skillet, and spread them out on a sheet of aluminum foil to cool.
Place in a large salad bowl the mixed greens, cranberries, cheese, vinaigrette, vinegar, and olive oil. Toss gently; add candied walnuts, and toss again.
