Dressing:
1/2 cup plain Greek yogurt
1.5 tsp. Dijon
1 tsp. cider vinegar
1/2 lemon, juiced
salt and pepper

Salad:
1/2 cup walnuts
1 small head Romaine lettuce, finely chopped
1/2 lb. cooked, peeled shrimp
4 small celery ribs plus leaves, chopped
1 Gala or Granny Smith apple, cored and cut into 1/2 in. pieces
2/3 cup seedless grapes, halved

1/2 cup plain Greek yogurt 1 5 tsp. Dijon 1 tsp cider vinegar 1/2 lemon, juiced 1/2 cup walnuts 1 small head Romaine lettuce, finely chopped 1/2 lb. cooked, peeled shrimp 4 small celery ribs plus leaves, chopped 1 Gala or Granny Smith apple, cored and cut into 1/2 in. pieces 2/3 cup seedless grapes, halved

Dressing:
Whisk together all ingredients. Taste and adjust seasoning and lemon juice as needed.

Salad:
Toast walnuts in a dry frying pan over medium for 2 to 3 minutes. Toss ingredients and dressing.