I haven’t been keeping up with Cosi, but apparently they have been serving Vietnamese chicken soup (Pho Ga) on their menu. The soup is made with white meat chicken, rice noodles, and herbs, served everyday. Right now they are running a promotion, where you can add a Pho Ga side soup to any entree for $1. Available at participating locations for a limited time only.
Have you tried their Pho Ga? What are your thoughts?