Jacob's on the Mall recently introduced a separate vegan menu - which can be requested when you pre-book your table. This is a really good restaurant and they take the food here very seriously. The food is beautifully presented and tastes great. I was very impressed with their vegan menu. There are 3 choices per course. This is something of a 'first' for Cork. Cafe Paradiso, for example, only has one vegan item on their menu and they are a fully vegetarian restaurant (Jacob's is not). I also felt that at €28 for the 3-course meal it was very good value. Highly recommended - 5 stars!
Cons: Vegan menu must be pre-booked