Umi is well known for preparing the best falafel in Cork . I don't know other falafel-specialized places here, but for sure Umi's ones are really good.
Quay Co-op has been serving vegan and vegetarian food to corkonians over 30 years already, both in their shop on the ground floor and in their restaurant upstairs.
Guys from Oak Fire Pizza started some years ago selling mini pizzas in a trailer. After opening two pizzerie in Skibbereen and Clonakilty, they finally arrived to Cork just a couple of months ago.