Put a pot of salty water on to boil.

In a bowl mix together the tuna, olive oil, capers, parmesan cheese, lemon zest, a good squeeze of lemon juice and a good amount of freshly ground black pepper. Check the seasoning and add salt as needed.

Cook the pasta as per the instructions but drain 1 - 2 minutes before it is finished. RESERVE some of that pasta water as you will need to use some of it to finish the cooking off of the pasta.

Place the pasta back into the pot along with the tuna mixture and continue the cooking, add a spoonful of the pasta water as needed to stop the pasta from drying out. Give another good squeeze of lemon over the pasta, taste, add salt and pepper as needed and some more lemon juice as needed.

Once finished, dish the pasta up, topped off with some fresh rocket.