"Pierogi Casserole transforms store-bought pierogies into a delicious, layered casserole with a creamy cheese sauce and sliced kielbasa. A family favorite meal!..."
INGREDIENTS
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4 Tablespoons (1/2 stick) salted butter
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4 Tablespoons all-purpose flour
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1 teaspoon garlic powder
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1 teaspoon onion powder
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1/2 teaspoon salt
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1/2 teaspoon black pepper
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2 cups milk
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2 Tablespoons dijon mustard
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4 cups shredded mozzarella cheese (divided use)
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2 (16 ounce) packages frozen pierogis
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12 ounce package kielbasa, 1/4-inch sliced
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8 ounce can sauerkraut, drained, rinsed well, and the excess water squeezed out ((optional))