Place the potato in a medium saucepan, cover with cold salted water and place over medium heat. Bring to the boil and cook for 8–10 minutes or until tender. Drain well, place in a large bowl and crush roughly with a fork. Set aside.
Add the herbs, tartare sauce, dijon mustard, lemon zest and season to taste with salt and pepper. Mix to combine. Add the salmon and gently fold through.
Divide the mixture into 8 portions and shape into patties. Dip each pattie into flour to coat, then egg wash then press into the breadcrumbs to coat. Cover and chill for at least 30 minutes or until ready to cook.
Heat 1cm of oil in a large non-stick frying pan over medium heat. Add the fish cakes and cook for 3–4 minutes each side or until golden brown and heated through. Drain on paper towel. Sprinkle with sea salt and serve with mixed salad leaves and Lemon Aioli Mayonnaise. Garnish with lemon wedges.