8ouncecan sauerkraut, drained, rinsed well, and the excess water squeezed out(optional)
Instructions
Preheat the oven to 375°F. Spray a 9x13-inch baking dish with cooking spray and set aside.
In a medium saucepan over medium heat, melt the butter. Whisk in the flour, garlic powder, onion powder, salt, and pepper. Cook for 1 minute.
Very slowly stream in the milk while whisking constantly. Then stir in mustard. Bring to a simmer while whisking occasionally.
Once at a simmer, take off the heat, stir in half of the cheese until melted, and set aside.
Place half of the pierogies on the bottom of the prepared baking dish in an even layer.
Spread out half of the sauce on top.
Add half of the sliced kielbasa, followed by half of the sauerkraut.
Add the remaining pierogies on top, then the remaining sauce, sausage, and sauerkraut.
Sprinkle all of the remaining mozzarella on the top.
Cover with nonstick foil or spray a piece of foil with cooking spray and cover the dish. Bake for 60 minutes until bubbly. Remove the foil and bake an additional 15 minutes to brown the cheese.
Allow to cool slightly and serve.
Notes
Please refer to my FAQ’s (Frequently Asked Questions) and ingredient list above for other substitutions or for the answers to the most common questions.