Begin by preparing your dough the day before.
For the Thousand Island dressing, mix all ingredients in a bowl. Place in refrigerator to chill.
Preheat the pizza oven to 700 degrees F; alternatively, preheat your kitchen oven to the max 550F with a pizza stone. Stretch the dough out thin, approximately 15"-16" round.
To assemble the pizza, top with swiss and mozzarella cheeses. Then add the corned beef and sauerkraut. Finally, sprinkle with caraway seeds.
Bake for 4-5 minutes if using a pizza oven, or 6-7 minutes if using a kitchen oven (with the final minute under the broiler one high), until spotted, browned, and gorgeous.
Remove from the oven and top with Thousand Island dressing. Serve hot.