Almost-Instant Pierogies - cooking recipe

Ingredients

3 lbs potatoes, peeled, quartered, and boiled
2 cups shredded sharp cheddar cheese
1 teaspoon salt
1/2 teaspoon pepper
1/2 cup margarine
4 cups sliced onions
1 (12 ounce) package jumbo pasta shells, cooked

Preparation

Combine potatoes and cheese together; mash until smooth.
Stir in salt and pepper; set aside.
Melt the margarine in a skillet; add in onions; stir/saute 10-15 minutes.
Spread half the onions in a 13x9-inch pan.
Stuff each pasta shell with potato mixture; arrange shells over onions.
Sprinkle remaining onions over shells.
Bake in a 350\u00b0F oven for 20-25 minutes.