In a large bowl, add 1/2 cup of mayonnaise, 2 tablespoons of lemon juice, 2 teaspoons of curry powder, 1/4 teaspoon of celery seed, and season with salt and pepper to taste. Whisk to combine until smooth.
Next, add in 4 cups of cooked chicken, 2 finely chopped celery ribs, 1 cup of halved grapes, 4 thinly sliced scallions, and 1/2 cup of slivered almonds. Toss to coat.
Taste the salad and season with more salt and pepper if needed.
Fold in 2 tablespoons of minced parsley for freshness.
Transfer to a serving dish and chill in the refrigerator for 30 minutes to allow flavors to meld.
Serve on slices of bread or in lettuce cups.