Spray counter lightly with non-stick cooking spray. Knead dough together into a ball. Roll to a 13 inch circle. Place in a 12 inch sprayed pizza pan. Poke several times with a fork to prevent bubbles from forming and pre-bake at 400°F 10 minutes.
Saute onion in butter. Set aside. Spread pre-baked crust with dressing. Sprinkle with 1 cup cheese. Cover with meat slices, cooked onion, sauerkraut and remaining cheese.
Bake at 400°F 10-15 minutes.