Credit: Trisha NoonanOn the lawn of the former Copy Cat building at 1830 Sherman Ave., The Tea Workshop sells what founder Chase Piatek describes as “origin-forward tea.” The tea pop-up space, which will officially start service Saturday and run through Nov. 30, is the latest iteration of The Tea Workshop. The Tea Workshop sources ingredients from all over the world, including Malawi, Japan, Taiwan, China, Greece and the United States. Making Evanston homeAs their mobile tea space grew in scope and reach, Piatek found people telling him that he had to bring The Tea Workshop to Evanston. Long-term fixtureMoving forward, The Tea Workshop will be open outdoors for patrons until Nov. 30.