Onsen Tamago is a traditional soft-boiled egg that has runny egg white on the outside and almost hard egg yolk inside. Yes, it is the other way around to a standard soft-boiled egg where the egg white is hard and the yolk is runny. Eat Onsen Tamago in the traditional way with a special dashi-based sauce.Prep Time includes the time to chill water in the fridge as well as taking the eggs from the fridge to room temperature.It takes a long time to make Onsen Tamago but you are really not doing anything for most of the 2.5 hours!Don't forget to see the section 'MEAL IDEAS' below the recipe card! It gives you a list of dishes that I have already posted and this recipe that can make up a complete meal. I hope it is of help to you.