Pierogi (Polish Dumplings)

To prepare the sauerkraut filling, melt the butter in a skillet over medium heat. Stir in the onion, and cook until translucent, about 5 minutes. Add the drained sauerkraut and cook for an additional 5 minutes. Season to taste with salt and pepper, then remove to a plate to cool.

For the mashed potato filling, melt the butter in a skillet over medium heat. Stir in the onion, and cook until translucent, about 5 minutes. Stir into the mashed potatoes, and season with salt and white pepper.