Spray counter lightly with non-stick cooking spray. Combine two rolls together and flatten into a 7-inch circle. Repeat with remaining rolls.
Combine the sauerkraut, dressing, Swiss cheese and seeds together in a bowl. Divide the corned beef into 6 equal portions and place in the center of each dough circle. Divide the sauerkraut mixture into 6 equal portions and place on top of corned beef being careful that it doesn't touch the edges.
Moisten the edges of each circle with water. Fold each dough circle in half covering the filling. Press it down to seal edges together with your fingers or a fork.
Place turnovers on a sprayed baking sheet. Make 3 small cuts in the top to vent the steam. Brush with beaten egg white and sprinkle with caraway seeds.
Bake at 350°F 18-20 minutes or until golden brown.