For this recipe you will need:
1 pound lasagna noodles
To prepare this recipe:
Cook the noodles according to package directions.
Boil the potatoes until they can be easily pierced with a fork. Mash the potatoes, add the cheese, salt and pepper to taste and beat with a mixer. Melt the butter in a pan, add the onions, and saute until they are soft. Season the onions with salt and pepper to taste.
Generously butter a 9 x 13-inch baking dish. Place a layer of noodles in the dish, then a layer of the potato mixture. Repeat, ending with the noodles. Pour the butter and onions over all. Cover with foil and bake until heated through, about 20 to 30 minutes.