That Sushi Place
Complete enough missions around the Empire, and you'll finally get access to that incredibly bigoted sushi place everyone keep talking about.
Start by blowing up the sign outside.
Build the pieces into a tapedeck, which will cause someone inside to smash the doors open for you.
Activate the magic portal behind the conveyor belt.
Once through, pull at the pull-loop to release some pieces.
These can be built into a trackball port & wire that will advance the conveyor belt outside.
Roll until a gold brick emerges, then claim it as your own.