Steve, the recipe below (as written)calls for almonds rather then the walnuts
you requested.... that's an easy substitution. Hope this looks good to you.

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Pasta Salad with Chicken and Artichokes

Ingredients (6 servings)

1 lb Pasta shells
1 1/2 c Mayonnaise
3 tb Chopped parsley
3 c Diced cooked chicken
1 ea Dash of tabasco
2 tb Oil
3 tb Lemon juice
1 ts Dried parsley
6 oz Jar artichokes chopped and
1 ea Toasted almonds

Instructions

Cook pasta in large pot of boiling, salted
water until tender, but firm, 8 to 12 minutes,
stirring often. Drain well and rinse with
cold water. Shake out excess water and toss
pasta with oil.

Combine mayonnaise, lemon juice, parsley
and basil. Place pasta in large bowl.

Add mayonnaise mixture, chicken, artichokes
and tabasco. Toss well. Garnish with almonds.

For a decorative presentation, serve in
avacado halves, in tomato cups or on lettuce
leaves. Yields 6-8 servings.