Polish Pasta Casserole
Ingredients
- 4 cups uncooked short pasta, such as penne or fusilli
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 2 1/2 cups milk
- 1 cup sour cream
- 2 tablespoons Dijon mustard
- 1 teaspoon garlic powder
- 1 (16 oz) jar sauerkraut, rinsed and well-drained
- 1 1/2 lbs smoked Polish sausage or kielbasa, sliced 1/2-inch thick
- 3 cups Swiss cheese, grated and divided
- 4 green onions, chopped
- Kosher salt and freshly ground black pepper, to taste