Corned Beef with russet

2 large russet potatoes , peeled and cut into 1/2-inch cubes 1/2 teaspoon salt 1/4 teaspoon pepper 1/4 cup butter 1 large onion , chopped 8 ounces corned beef[...]

1/4 cup butter or 1/4 cup margarine 1 cup finely minced onion 2 cups cooked peeled and sliced russet potatoes 2 cups chopped cooked fresh corned beef or 1 (12[...]