Souper Meat and Potatoes Pie

1 can cream of mushroom soup
1 pound ground beef
1/4 cup onion
1 egg
1/4 cup fine, dry bread crumbs
2 tablespoons parsley
Salt and pepper
2 cups mashed potatoes
Cheddar cheese, shredded

Combine first 7 ingredients and press into a 9-inch pie plate. Bake at 350 degrees F for 25 minutes. Spoon off fat. Frost with mashed potatoes. Top with cheese. Return to oven for just a couple minutes to melt the cheese and heat the potatoes.