The Mamaleh's Delicatessen team — currently aiming for a "May-ish" opening at One Kendall Square, according to co-owner Rachel Miller Munzer — will be popping up at Eastern Standard in Kenmore Square from 11 a.m. to 3 p.m. this Saturday, March 5 to offer a small preview of what's to come, including a smoked fish sampler and delicatessen pastries. The items will be available a la carte, served alongside Eastern Standard's usual brunch offerings. There will also be special drinks from Mamaleh's co-owner Evan Harrison, including egg creams, celery soda, a seeded rye Manhattan, and more. Reservations recommended; find several methods on Eastern Standard's website.