Pierogi are traditional Polish dumplings that can be filled with a variety of ingredients. One delicious way to enjoy them is by turning them into a hearty casserole! This cheesy pierogi casserole recipe is perfect for any occasion and can be easily adjusted to include your favorite toppings, from sautéed onions and bell peppers to crumbled bacon or cooked mushrooms.
#### Ingredients
- **1 lb frozen pierogi** (various fillings such as cheese, potato, or meat)
- **2 tablespoons olive oil**
- **1 medium onion, finely chopped**
- **3 cloves garlic, minced**
- **1/4 cup all-purpose flour**
- **2 cups milk (dairy or non-dairy alternatives work well)**
- **1 teaspoon salt**
- **1/2 teaspoon black pepper**
- **1 cup shredded mozzarella cheese** (or a vegan alternative like nutritional yeast)
2. Bring a large pot of water to a boil and add the frozen pierogi. Cook according to package instructions, usually about 4-6 minutes until they float to the surface.
3. Drain and set aside.
**Step 2: Make the Sauce**
1. In a large skillet, heat olive oil over medium heat.
2. Add chopped onions and sauté for 5-7 minutes until soft and translucent.
3. Add minced garlic and cook for another minute, stirring constantly to prevent burning.
4. Sprinkle flour over the mixture and stir well to combine. Cook for about 1-2 more minutes.
5. Gradually whisk in milk while continuously stirring to avoid lumps. Bring the mixture to a simmer and let it thicken slightly (about 3-4 minutes).
**Step 3: Layer the Casserole**
1. Transfer half of the cooked pierogi into the prepared baking dish, creating an even layer.
2. Pour the creamy sauce over the pierogi, spreading it evenly with a spatula or spoon.
3. Sprinkle shredded mozzarella cheese over the top of the sauce.
**Step 4: Add Optional Toppings**
- If desired, add your chosen toppings (like sautéed vegetables, cooked bacon, or grated Parmesan) on top of the cheese layer.
**Step 5: Bake and Serve**
1. Place the casserole in the preheated oven and bake for about 20-25 minutes until the cheese is melted and bubbly.
2. Remove from the oven once the cheese has melted and the edges are golden brown.
3. Let it rest for a few minutes before serving to allow the flavors to meld together.
#### Tips
- For added flavor, you can add spices like paprika or nutmeg to your sauce.
- To make this recipe vegan-friendly, use non-dairy milk and cheese alternatives in place of dairy products.
- Experiment with different pierogi fillings for a variety of tastes!
Enjoy your homemade cheesy pierogi casserole! This comforting dish is perfect for family dinners or cozy nights in.