California Cobb Salad with Grapes

1 12-ounce package romaine lettuce hearts, washed, dried, and chopped (about 7 cups) 

2 cups turkey breast, 1/2-inch dice

2 avocados, 1/2-inch dice

2 cups California seedless grapes, rinsed

1 cup blue cheese, crumbled

1 cup bacon bits

1 cup slivered almonds, lightly toasted

Green Goddess Dressing:

1/2 cup mayonnaise

1/3 cup sour cream

2 teaspoons white wine vinegar

1 1/2 teaspoons anchovy paste

2 tablespoons minced tarragon, fresh

3 tablespoons minced chives or green onions

2 tablespoons minced parsley

1/4 teaspoon ground pepper

pinch salt