Work on Southside Cafe, a 24-hour restaurant at 5404 Manchaca Road, began Oct. 1, said Shane Widner, president of South Austin Ventures LLC. The business will feature a wood-fired pizza oven, breakfast menu, and lunch and dinner specials, Widner said. SAV bought the former Bakehouse Restaurant and Bar site last year and aims to open Southside Cafe by March, he said.