Step 1
In a blender, place egg yolks, dashi powder, water, and mirin. Mix until blended.
Step 2
Slowly incorporate melted butter until everything is emulsified together.
Step 3
Place some smoked salmon at the bottom of each tart shell or cracker, then add the savoury egg custard.
Tips
For an extra boost of umami, add some shaved roasted dried oyster.