This document summarizes a presentation on establishing a Legal Interoperability Lab. The lab was a fully online training course developed by Dr. Fotis Fitsilis involving the Hellenic Parliament, National School of Public Administration & Local Government, and Hellenic OCR Team. The course covered legal informatics, interoperability standards, and used the LEOS tool to draft sample legislation. The lab was successfully conducted and provided a basis to develop further interoperability training and engage stakeholders, though technical barriers remain to fully utilizing open-source tools like LEOS.