Preheat oven to 400 degrees.
Put pie shell in a lightly sprayed, glass pie dish. Keep it cool until ready to use.
In a bowl, beat cream cheese, milk & sour cream. Beat in eggs until smooth. Add parsley, SeasonAll, cayenne pepper & garlic powder & mix well.
Heat olive oil in a pan and add onion & chopped peppers. Saute until soft & add the chicken. Cook until chicken it"s just done. Do not brown the chicken.
Mix the chicken & vegetables with the egg mixture a little @ a time to prevent curdling. Sprinkle half of the cheese on the bottom of the pie shell. Pour the mixture over the cheese & cover the mixture with the rest of the cheese. Set in the middle of the oven with a sheet of foil on bottom rack to catch any over spills. Bake for 40-45 minutes or until slightly firm & cheese on top is golden. Let cool on a rack for about 10 minutes & it will set & become firm to the touch.