Preheat oven to 400 degrees.
In a skillet, fry bacon until crisp. Crumble and set aside. Pour out excess grease but don’t clean the pan.
Melt butter in the same skillet. Add onions and cook for a few minutes. Add mushrooms zucchini, red pepper, and artichokes and cook for a few more minutes. Salt mixture to taste. Remove from heat and allow to cool for about 20 minutes.
Roll out pie crust and press into deep dish tart pan. (May also use 2 standard pie crusts for this recipe.) In a large bowl, beat eggs with cream. Add grated cheese, salt and pepper, and set aside.
With a slotted spoon, add vegetable mixture into egg/cream mixture. Stir together.
Add pancetta or bacon and stir. Add parsley or chives, if desired.
Pour into pie crust and press to submerge ingredients. Cover loosely with foil, place on a baking sheet, and bake at 400 degrees for 1 hour. Bake for slightly longer if quiche is overly jiggly.
Remove from oven and allow to set for ten minutes before serving. Remove quiche from pan and slice into wedges.