Peel and quarter the potato and place into a small pot and cover with salted water. Bring to a boil over high heat, then reduce heat to medium-low, cover, and simmer until tender, about 15 minutes. Drain and allow to steam dry for a minute or two, then mash the potato with a potato masher or fork in a large bowl.
Mix the tuna, egg, onion, Dijon mustard, breadcrumbs, garlic powder, Italian seasoning, cayenne pepper and salt and pepper into the mashed potato until well-blended. Divide the tuna mixture into 8 equal portions and shape into patties.
Heat the olive oil in a frypan over medium heat. Pan fry the tuna patties until browned and crisp, about 3 minutes on each side.
Just like my mum's tuna patties.. I coated them in Panko crumbs and shallow fried. DELICIOUS!!
(To crumb, form into patties and refrigerate for an hour, then dip in beaten egg, and then Panko crumbs, refrigerate again until firm, and then shallow fry) Even better the next day as a cold lunch. - 28 May 2012