A true quiche is the quiche lorraine which originated in northeastern france in a region known as alsace-lorraine, hence its name. This rich, savory egg custard and bacon pie with gruyre cheese is baked in a pastry crust. Over the years, however, the original recipe has been adapted to include a variety of ingredients, including, in this case, salmon to make a filling meal for a special lunch when eaten with a side salad and artisan bread and butter. For an even heartier meal, serve it with a simple soup or consomm. Typically, fish and cheese are not complementary flavors so the latter is left out here, but you will see seafood and cheese combined in the same dish in other recipes.