flavor, do not thaw)
1 medium yellow onion, thinly sliced
4 tablespoons unsalted butter, melted (or sliced)
1 cup shredded cheddar cheese (mild or sharp)
Directions
Lightly coat the inside of your slow cooker with nonstick cooking spray or a thin layer of butter to help prevent sticking.
Arrange the frozen pierogi in a single, snug layer on the bottom of the slow cooker, as evenly as you can. It’s fine if a few overlap slightly, but try to keep
