Pierogi Casserole - cooking recipe

Ingredients

1 cup mashed potatoes (instant or leftovers is fine)
1 lb shredded cheddar cheese
3/4 cup butter
2 -3 medium onions, diced
9 -12 lasagna noodles

Preparation

Cook noodles as directed on package to al dente.
Saute onions in 1 stick of butter (may use more if desired).
Butter 13x9 inch pan with remaining 1/2 stick butter.
Mix sauteed onions with mashed potatoes.
Layer noodles, then potatoes, then cheese, and repeat, ending with cheese.
Cover with foil and bake in a 350\u00b0 oven for 25-30 minutes or until cheese is melted.