We have here the duck egg called balut which is semi fertilized with an embryo of the duck inside. It is a weird food that is a big challenge to foreigners. Balut is high in protein and fats that old folks say you should not eat more than 2 of that eggs for you might get an overdose of vitamins. I think balut is good for OMAD especially those who need proteins. You can add one or 2 balut eggs to your meal for more proteins and fats.