Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      whole         onion -- chopped
   2      teaspoons     butter
   1 1/2  cups          swiss cheese -- grated
   2      whole         eggs -- plus
   2      whole         egg yolks
     1/2  cup           yogurt
     1/2  teaspoon      salt
   1      dash          pepper
   1      9" whole      bake pie shell
   8      whole         bacon strips -- crumbled

Preparation:

Preheat oven to 375 degrees. Saute onion in butter until transparent. Mix in beaten eggs, yogurt, salt, pepper. Sprinkle cheese in bottom of pie shell and pour egg yogurt mixture on top. Cover with cooked onion (and either bacon or mushrooms.) Bake for 35 to 40 minutes till custard is set. Unbaked pies can be frozen and thaw before baking. Can saute 2 C. sauteed mushrooms and add.