Tamagoyaki is a popular Japanese rolled omelette that is commonly eaten for breakfast or packed in bento lunch. You can make a plain Tamagoyaki or mix in many different ingredients for flavor variation. Today, we added a canned tuna and chopped green onions. An entire can of tuna (in water) can be added directly in the egg mixture, which will make it almost like Dashi. It’s packed with umami and quite satisfying with added protein. If you do not have a Tamagoyaki pan, you can simply make this into a regular omelette in a frying pan. It’s so simple to make with easy to find ingredients.