Heat oven to 400. Separate 1 can of dough into 4 rectangles. Place on ungreased 12" pizza pan; press over bottom and 1/2 inch up sides to form crust. Firmly press perforations to seal.
Layer corned beef, cheese and sauerkraut over dough. Sprinkle with caraway. Separate second can of dough into 8 triangles. Arrange triangles in spoke-like fashion over filling with points toward center. Do not seal outer edges to bottom crust. Sprinkle with sesame seed.
Bake for 20 minutes or until golden brown.