You'd be better off using a recipe that includes a marinade to infuse it with flavor, sprinkling the tuna steak with chopped leafy herbs (like cilantro) after it's done, adding a squeeze of lemon ...
Lay the tuna steaks in one layer in a shallow baking dish and pour two thirds of the vinaigrette over them. Turn the tuna to coat well. Cover with cling film and place in the fridge for 15 minutes.
Tuna is widely available, but can sometimes see a dip in availability due to the monsoon season and where the tuna has been landed. Various types of tuna – particularly yellowfin and skipjack ...
Set aside to cool. Slice the tuna into 11/2-inch cubes and cut each cube into 1/8-inch-thick squares. Mix the cream cheese with the wasabi until smooth, and season to taste with lime juice and salt.