Steam N' Mash Pierogi Casserole

• 2 (20 ounce) packages frozen mashed potatoes (Steam n' Mash Russet Potatoes, made according to package directions)
• 1 lb cheddar cheese, shredded
• 0.5 (8 ounce) box lasagna noodles, cooked al dente
• 1 cup unsalted butter
• 4 vidalia onions, chopped
• salt, to taste
• pepper, to taste

1. Preheat the oven to 350 degrees.
2. Make the Steam n' Mash Russet Potatoes according to package directions.
3. Saute the onions in the butter until cooked through, but not browned. Season with salt and pepper to taste.
4. Spray a 9" x 13" casserole with non-stick pan spray.
5. Place a layer of noodles on the bottom of the casserole; spread about 1/2 of the potatoes on top of the noodles.
6. Sprinkle with 1/2 of the grated cheese and top with 1/3 of the onion / butter mixture.
7. Repeat this step; ending with the final third of the onion / butter mixture. Cover with foil and bake the casserole for 30 minutes.
8. Serve immediately.

frozen mashed potatoes, cheddar cheese, lasagna noodles, unsalted butter, vidalia onions, salt, pepper

Taken from www.food.com/recipe/steam-n-mash-pierogi-casserole-352489 (may not work)