Social Media Wrap: Starbucks Pistachio latte range; Subway partners with Doritos; wagamama visits Vietnam

Find out what QSRs have been up to on social media this week.

 Starbucks unveils the new Pistachio latte ranges.

Subway UK & Ireland partners with Doritos to launch footlong nachos.

wagamama goes to Vietnam to interview chefs, cooks, and restaurant owners.