Preheat the oven to 350°F. Place 1 wonton wrapper into each muffin tin well and press down carefully. Spray lightly with cooking spray. When oven is ready, bake for 8-10 minutes, until wontons are crisp. Let cool.
Meanwhile, make the chicken salad. Mix together chicken, grapes, celery, green onion, almonds, mayonnaise, parsley, salt, celery seed, and black pepper. Chill until ready to use.
Once the wontons are cool, fill each with a scoop of chicken salad and serve.
Notes
Unfilled wonton cups can be stored in an airtight container once completely cooled. Fill cups just before serving.