What started as an irresistible pun, a pie-rogi pie, became a winning comfort food pie that tastes like a cross between loaded baked potatoes and macaroni and cheese.
Melt butter in a medium-sized skillet over low heat.
Stir in onion and cook until starting to soften, about 10 minutes.
Add the broth and bring to a simmer.
Cook, stirring occasionally, until onions are very soft and deeply browned, about 1 1/2 to 2 hours. (If onions start to burn before they are fully caramelized, add 1 to 2 tablespoons additional broth as needed.)
Pierogi Pie Instructions
Preheat oven to 350 F.
Toss pierogies in egg white, coating all sides of each pierogi.
Line the bottom and sides of a greased 5" pie pan with coated pierogies.
Top with sour cream, onions. bacon. and cheese.
Bake for 30 minutes or until cheese is melted and the edges of the outermost pierogies are slightly browned.