Preheat the oven to 425 degrees F (220 degrees C). Line a 15x10-inch pan or large pizza pan with prepared dough, making sure dough extends up sides of pan.

Sauté onion in a skillet until translucent and pour cooked onion into a large mixing bowl. Place bacon in a large, deep skillet. Cook over medium high heat until evenly brown. Drain, chop and add to onion; mix well.

Stir in sour cream. Beat eggs enough to break up yolks, then mix in to pie mixture. Add flour to thicken mixture (onions will create a lot of water), then add salt. Mix well and pour mixture into prepared pan. Sprinkle top with caraway seed.

Bake in preheated oven until onions start to turn golden brown on top, about 1 hour.