Tuna is great seared and in this case the Cajun seasoning is a wonderful addition to the flavour. Traditionally it is cooked until the seasoning turns black, but this not necessary.
This recipe is very simple and takes little time. The only thing you need to watch out for is buying a cajun seasoning without salt. Because of the generous amount of seasoning you will put on the tuna, the salt content is extremely high if you choose a cajun seasoning with salt. Just a tip for people who need to watch their salt content. - 29 Sep 2008
Something else. Great recipe. You can also make on the barbecue by using a cast iron pan. Heat the pan on medium heat for 15 minutes. Halve the butter/oil and pour a small amount in the pan. Season tuna steak and put in pan. Smoke will be intense when you first put steaks in. Pour rest of butter/oil on steaks then turn. Cook for same amount of time as original recipe calls for. Steaks will be nice and blackened. I also use this recipe for swordfish. Very delicious too. - 29 Sep 2008
Husband loved it! More salty than spicy, so I think next time I will add cayenne and other herbs to the Cajun seasoning to bring up the flavour without over-salting. - 29 Sep 2008