Mushroom Quiche

Why I Love This Recipe
This recipe actually came off of a calendar about 20+ years ago! I've no idea what calendar it was, but it may have been one of those freebies businesses used to give away around the holidays.
Ingredients You'll Need
1 (9") pie crust
4 eggs, beaten
1/2 lb. fresh mushrooms, sliced
1/4 c. sliced green onions
1 Tb. butter
1 c. (4 oz.) shredded Swiss cheese
1 c. half-and-half, light cream or milk
1/4 c. grated Parmesan cheese
1/2 tsp. salt
1/8 tsp. pepper
Directions
Brush the inside of the pie shell with a small amount of beaten egg. Prick bottom & sides with fork. If using pie plate, bake shell in preheated 425º oven 5 min. ot 'til light golden brown. If using metal pie pan, bake shell @ 450º. Set aside. Reduce oven to 350º for pie plate, 375º for metal pan.
In large skillet over medium heat sauté mushrooms & onions in butter until browned & tender, about 6 - 8 minutes. Stir together mushrooms & Swiss cheese. Put into pie shell. To the beaten eggs, add all remaining ingredients. Beat until well blended. Pour over mushroom mixture. Bake in preheated oven 35-45 minutes or until knife inserted near center comes out clean. Let stand 5 min. before serving.
You may use a thawed frozen deep-dish pie shell. Prebake shell in preheated 450º oven. Bake quiche at 375º for 40 -45 minutes.
I like to serve this with a nice green salad or fresh fruit.