Stassi Schroeder offers look inside Ariana, Katie’s One thing About Her sandwich store

Stassi Schroeder gave “Vanderpump Guidelines” followers a sneak peek inside Ariana Madix and Katie Maloney’s One thing About Her sandwich store.  The sequence alum, 34, shared clips of the West Hollywood, Calif., institution in a number of Instagram Story posts shared Monday night.  Schroeder started by sharing a photograph of her BFF and former co-star…