SAUERKRAUT-MUSHROOM FILLING
About 2 cups
Heat in a large skillet over medium heat:
- 2 tablespoons butter or olive oil
Add and cook, stirring, until soft:
- 1 medium onion, finely chopped
Add and cook, stirring, until tender:
- 1 cup finely chopped mushrooms
Transfer to a bowl and stir in:
- 1 cup sauerkraut, drained and chopped
- Salt and black pepper to taste
Allow to cool completely before using.