Grilled Tuna on Potato and Onion Salad

Fresh tuna is a beautiful, meaty fish, but if you would prefer not to use it or just can’t find anywhere to buy it, this dish can work very well with turbot, brill, bass and many other fish. The tuna medallions have a very similar texture to fillet of beef, and are cooked in a similar fashion. Tuna fillet eats best when cooked medium rare to medium.