This rectangular sushi serving tray highlights the square symmetries of the gyroid surface. You can see this by viewing it straight along the z, x or y axis. Lower your speed and temperature and it will print without supports.

"Tray (regular)" prints without supports too, but doesn't look as nice. "Tray (extended)" is pictured above. The extended edge looks nicer, but it requires a fair amount of supports to print.

Cover with a piece of parchment paper for food safety purposes.

This tray is part of a larger set of gyroid themed serving pieces:

Gyroid Platter: https://www.thingiverse.com/thing:4622992 Modular Gyroid Stacking Structure: https://www.thingiverse.com/thing:4623089

See here for video of all pieces: https://youtu.be/WaxYEtFxjC0