Ammonite
Veteran
Looks like there's two vendors at the Valentine's event that sell buff food. The mastery food is outclassed, but the versatility food might be niche as the best 60-minute vers buff.
https://www.wowhead.com/item=210841/buttered-oysters gives a +2 Mastery
https://www.wowhead.com/item=210842/fresh-fig gives a +2 Versatility
Horde - https://www.wowhead.com/npc=214493/ming-plumpaw
Alliance - https://www.wowhead.com/npc=213096/guo-plumpaw
https://www.wowhead.com/item=210841/buttered-oysters gives a +2 Mastery
https://www.wowhead.com/item=210842/fresh-fig gives a +2 Versatility
Horde - https://www.wowhead.com/npc=214493/ming-plumpaw
Alliance - https://www.wowhead.com/npc=213096/guo-plumpaw