If you have a morrisons near you they do a thing called Tuna Tasters and its basically a herb falvour mix that you put through tuna, I use with some salad cream just to take the dryness away.
Red Pepper & Tomato Viniagerette
Ginger & Soy
Lemon & Cracked Black pepper
Jalepeno one with something else!
I think they work out at a 1.5syns but I am getting this checked as it is only a herb mix