1 pound smoked kielbasa or Polish sausage, cut into 1/4-in. slices
2 teaspoons butter
2 cups leftover or refrigerated mashed potatoes
1 cup sauerkraut, rinsed and well drained
1 cup shredded cheddar cheese
1 teaspoon caraway seeds
Unroll dough into a greased 15x10x1-in. baking pan; flatten dough and build up edges slightly. Bake at 425° for 8-10 minutes or until lightly golden brown.
Meanwhile, in a large skillet, saute kielbasa in butter until browned. Spread mashed potatoes over crust. Layer with sauerkraut, kielbasa, cheese and caraway seeds. Bake for 10-15 minutes or until golden brown.