From the "Art of German Cooking" by Betty Wason. My husband loves this cookbook, and is always so pleased when I try one of the recipes. He is from Germany and made a fan of all things German in me. Their recipes are so good!
1Pastry, Combine flour, baking powder, and salt. Chop in the butter by pastry blender or 2 knives, until mealy. Add the egg. Blend until consistency of pie dough. Add cream if dough is not sufficiently moist.
2Working lightly, pat into the bottom and sides of a 9 inch round layer cake pan. Brush egg white over bottom of crust, This prevents crust from becoming soggy.
3Filling: Cook the onions and bacon in butter until very soft. Add salt and caraway seed. Stir in flour, then slowly add cream. Remove from heat
4Add a little of the mixture to beaten eggs, then combine the two. Spoon into pastry lined cake pan. Bake in oven preheated to 375 F until pastry is crisp and golden and filling is firm. Serve hot from the oven