Polish Pasta Bake | Cooking Professionally

Ingredients

• 4 cups short pasta, such as radiatori or rotini
• 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
• salt, to taste
• freshly ground black pepper, to taste
• 1 (16-ounce) jar sauerkraut, rinsed and well-drained
• 1 1/2 pounds smoked Polish sausage or kielbasa, sliced into 1/2-inch-thick pieces
• 4 green onions, chopped, plus more, to taste, for garnish
• 3 cups Swiss cheese, grated, divided