In medium bowl, toss 4 teaspoons flour with thegrated cheese. Sprinkle mixture into thepie shell. On top of cheese, sprinkle 1/2 cup of diced ham.
In medium bowl, combine eggs, milk or cream, and then add salt and mustard powder. Beat until smooth and pour over cheese and ham.
Put piece of plastic wrap large enough to overlap sides over top of quiche, then a piece of foil, and seal well around the edges. (plastic keeps the foil from sticking to the food). Place prepared quiche in freezer.
When ready to prepare, preheat oven to 400 degrees F (200 degrees C.) Remove foil and plastic wrap. Put foil around edge of crust to protect it.
Bake in the preheated oven for 60 minutes, or until filling is set and crust is golden brown. Garnish with parsley and pimiento if desired
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