1Heat oven to 375^. Generously grease cookie sheet (I use parchment paper too). Unroll dough into 2 long rectangles; press perforations to seal. Sprinkle each with roasted peppers to within 1/2 inch of edges. Top with sauerkraut , cheese , meat,if using; press lightly onto dough.
Starting at short side of each rectangle, roll up; pinch edges to seal. With serrated knife, cut each roll into 8 slices. Place slices, cut side up , on greased paper on cookie sheet. Brush tops with melted butter and sprinkle with caraway seed,if desired.
Bake at 375^ for 13 to 19 minutes or until golden brown. Immediately remove from paper. Serve warm with sour cream or ketchup if desired.