My mom has been making this for years and now I make it. It is a family favorite, very tasty!
If desired, you can substitute real homemade mashed potatoes with either OreIda or Bob Evans frozen mashed potatoes.
Give it a try, I think you'll like it too!
Brown meat in large skillet w/onion; break it up until fairly fine. When cooked, drain off fat. Spread evenly in square 2 qt casserole.
Drain beans well, then evenly distribute over the meat in casserole. In deep bowl, combine the soup with 1 soup can of water, whisk to blend. Pour over the green beans.
Prepare mashed potatoes as usual with milk & butter; Salt & pepper to taste. Add the egg and beat until well-combined. If potato mixture is too stiff, add a little more milk until thinned out a little. Carefully spread over the soup layer.
Bake at 350°F for about 30 minutes, or until potato topping is lightly browned. Let rest about 5 minutes, then serve with large spoon.
This can be made and frozen, wrapped in two layers of foil and sealed well.