Pierce pastry shell thoroughly with a fork. Bake at 375 degrees 10 minutes. In a large bowl, whisk together eggs, milk, mayonnaise, and seasonings until smoot h. In a separate bowl, chop well together chicken, cheese, spinach, and onion. Bake at 180ºC or 45 to 50 minutes, until brown. Cool at least 30 minutes before cutting. Good with muffins, fruit, and a green salad. Recipe from "One Million Recipes CD" busted by Judy R.