Preheat oven to 400 degrees and unroll pastry sheet onto large baking sheet that has been sprayed wtih cooking spray.
Lay swiss cheese on pastry sheet then top with corned beef and then sauerkraut.
Roll up starting with the long sides.
Cut into 1/4″ rounds and place 2″ apart on the baking sheet.
Bake for 10 minutes, remove, sprinkle with caraway seeds and return to the oven baking another 5 minutes. Serve with thousand island dressing as a dipping sauce.