Tamagoyaki Japanese Rolled Omelette

In a medium bowl, gently whisk the eggs until just combined. Do not overbeat, as too much air can cause bubbles. Add the dashi stock, mirin, soy sauce, sugar, and salt. Whisk lightly until the sugar and salt are dissolved. Strain the mixture through a fine-mesh sieve to remove any chalazae or bits, ensuring a smooth omelette. This step is crucial for a silky texture.

Place a square or rectangular Tamagoyaki pan over medium-low heat. Lightly grease the pan with a small amount of vegetable oil using a paper towel. Ensure the pan is evenly coated and not excessively oily. A thin layer of oil is key to prevent sticking and achieve an even cook.

Once the pan is hot (a drop of egg mixture should sizzle gently), pour about one-third to one-quarter of the egg mixture into the pan, tilting the pan to spread it evenly into a thin layer. Ensure the heat remains low to prevent rapid browning.

As the egg layer begins to set but is still slightly moist on top, carefully lift one end of the omelette with chopsticks or a spatula and roll it tightly towards the other end. Once rolled, push the rolled omelette to one side of the pan, leaving space for the next layer.

Lightly re-grease the empty portion of the pan if necessary. Pour another portion of the egg mixture into the empty space, lifting the already rolled omelette slightly so that the new mixture flows underneath it. Cook until the new layer is mostly set, then roll the existing omelette over the new layer, continuing the rolling motion. Repeat this process with the remaining egg mixture, creating multiple layers.

Once all the egg mixture is used and the Tamagoyaki is fully rolled, cook for another minute on each side to ensure it is cooked through and lightly golden. Transfer the finished Tamagoyaki to a cutting board. Gently shape it into a neat rectangle using a bamboo mat or a paper towel while it is still warm. Let it cool for a few minutes, then slice it into 1-inch thick pieces. Serve immediately or chill for later use.