Preheat oven to 425ºF.
In a large mixing bowl, combine the ground chicken, onion, celery, carrots, blue cheese and grill seasoning. Mix everything together and portion the mixture out into meatballs about the size of a golf ball. Roll each meatball in the crushed corn flakes (give them a little press to make sure they stick to the outside) and arrange them on a baking sheet. Bake until cooked through, about 15 minutes.