Est. 10/14 at local bar "It's Mustard." Woman-owned business. Mushroom themed food pop up in Southsea offering an immersive dining experience. Check Instagram for reservations, menu and info on opening hours as can vary. Serves a selection of burgers inspired by round the world flavors, alongside dirty sides (think mac n cheeze, tenders and loaded fries), all made using the humble mushroom. Also offers mushroom free options. Open Thu-Sat 16:00-20:00. Closed Sun-Wed.