This is all you need, how simple can it be?
A pre made pie shell
half and half
I started by preheating the oven to 450. I covered the edges of the pie shell with foil and baked it for about 10 minutes. While that was baking, I sauteed the mushrooms (I just cut up a lot, I don't know how many, if I had to guess, I'd say a lot!). You could buy pre-sliced and save yourself a bit more time. When they're done, spoon them out in to your egg mixture along with the Swiss cheese. Pour it into your pie shell. I like to tossed in some parsley flakes for color. Then I just bake it with foil still covering the edges of the crust for about 20 minutes at 375 degrees. Remove the foil and bake and additional 10 minutes.