Mash the tuna, mayonnaise, lemon zest and spring onions together in a large bowl. Stir in the breadcrumbs, half the Walnuts and the egg, season and mix well then divide into 4 fishcakes. Press the remaining Walnuts into both sides of each fishcake.
Heat the oil in a large frying pan and fry the fishcakes for 2-3 minutes on each side until golden.
Serve with tartare sauce and salad.
Notes
Cooks tipGreat to use up bread that is a few days old. Eat 2 straight away and freeze the remaining 2 for a later date, just allow to cool completely.Salt: 0.85g