Let's see here: 10 eggs + 3/4 pounds potatoes + a large onion + 1/2 a small onion + a cup of cheese + a "small" head of lettuce + odds and ends, for 4 servings. Did you guys ever read the book "Supersize Me"? Or are you all too young to have been around for that? I find it really hard to believe there would be only 538 calories per serving of this dish. It does sound tasty, tho!
http://grazinggringo.blogspot.com/2018/03/tortilla-espanola.html Such a tasty dish!