Cranberry Walnut Salad

I love having fruit in my salads.  It is a nice change from my normal vegetable dinner salad and this is so easy to make!

1 serving of bagged salad (I used Fresh Express Fancy Greens because I am fancy.  HA!)
2 Tablespoons of chopped walnuts
2 Tablespoons of dried unsweetened cranberries
2 tsp. balsamic vinegar
the juice of half a lemon