In a bowl, whisk 2 eggs with half of the soy sauce and sesame oil until well combined.
Heat a little olive oil in a non-stick frying pan over medium heat.
Pour in the eggs and allow them to spread evenly across the pan.
Scatter half of the edamame beans and some of the sesame seeds over the surface.
When the omelette is almost set but still slightly soft on top, place half of the sardines on one side.
Fold the omelette over and cook for another 1 minute or so, until just set. Slide onto a plate.
Repeat the process with the remaining eggs, edamame, sardines and sesame seeds to make a second omelette.
Serve immediately with sourdough bread or lentil scones, and a drizzle of extra sesame oil if desired.