In a mixing bowl combine flour, shortening and salt. Use a pastry cutter to cut shortening into the flour until the shortening resembles small peas.
Add ice cold water and mix into the dough until it comes clean from the sides of the bowl. Form dough into a ball.
Sprinkle your work surface with flour and gently roll out dough until it is about 2 inches larger than your pie pan.
Gently lift dough into pie pan and tuck excess dough under and crimp edges together.
Set aside while you prepare the filling.
Prepare the filling:
Preheat oven to 425° F.
In a mixing bowl, whisk together, cream, milk, eggs, nutmeg, salt & pepper.
Layer ½ the cheese into the bottom of the pie crust.
Using a paper towel pat red peppers dry, removing as much of the excess liquid as you can.
Spread the chopped roasted red peppers in an even layer over the cheese in the pie crust.
Top roasted red peppers with the remaining Gruyere, Mozzarella and Cheddar cheeses.
Pour egg mixture evenly over the cheese/red pepper filling in the pie crust.
Sprinkle the top evenly with Parmesan cheese.
Bake in the 425° oven for 15 minutes, then reduce heat to 325° and continue to bake for another 50-60 minutes or until center of the quiche is no longer jiggly when you shake the pie pan back and forth.
Let quiche rest for 20 minutes before cutting into it and serving.
Notes
Use a pie ring to keep the crust from getting too dark along the edges or cover pie crust edges with foil.