crust: 2 cups flour
1/4 pound butter or margarine
1/2 cup club soda or Schweppes
salt filling: 3 large onions -- very thinly sliced
2 tablespoons butter or margarine
1/2 pound grated Swiss or Gouda cheese
1 tablespoon flour
1 cup heavy cream
salt -- pepper, and nutmeg
NOTE 1: All ingredients should be very cold.
DOUGH: Cut butter into flour and salt until it resembles very coarse meal. Stir in soda. Knead just to combine. Wrap in film and refrigerate 1 hour.
On a floured board roll out dough, fold in 3's, as if you were folding a letter. Chill 1 hour.
FILLING: Cook onions in butter until translucent. Let cool. Stir flour into cheese. Blend eggs, cream and seasonings.
Roll out dough and place in a quiche pan. Spread onions in the bottom. Spread cheese mixture and pour cream and eggs on top.
Bake in pre-heated 350 oven for 20 minutes. Turn down heat to 300 and bake another 35 minutes.