Local Vietnamese spot PhoNatic, the Allandale fast-casual brainchild of the family behind the sprawling Asian grocery superstore MT Supermarket on North Lamar, will expand to three locations in 2013, moving into South Austin and an as-yet unannounced third spot this year, both of which will be served by a new, central commissary kitchen. The south location, at Interstate 35 and Slaughter Lane, will open sometime in February.