This salad has an interesting dressing. It is reminiscent of a vinaigrette but with lemon. The tarragon works perfectly with grapes and walnuts.
We liked this salad a great deal.
For the dressing:
3 tablespoons sour cream
1 tablespoon lemon juice
1/2 teaspoon lemon zest
1/3 cup olive oil
1/4 teaspoon granulated sugar
1 teaspoon finely chopped fresh tarragon
For the salad:
1 small head lettuce, chopped or torn
1 cup red grapes, halved
1/2 cup walnut pieces