Layer half of the frozen pierogies in the casserole, followed by half of the alfredo sauce on top, half the crispy chopped bacon, half the chopped green onions, and half the cheese.
This family-friendly Cheesy Pierogi Casserole is layered with cheddar pierogies, creamy sauce, crisp bacon, scallions, mozzarella, and cheddar cheese. This hearty casserole feeds six and takes less than fifteen minutes to get in the oven.