1 large floury potato, peeled and quartered
Β½ unwaxed lemon, finely grated zest only
2 large spring onions, finely sliced
55g/2oz plain flour
1 tbsp tartare sauce
sea salt and freshly ground black pepper
generous knob unsalted butter
1 small free-range egg, lightly beaten
250g/9oz fresh salmon fillets
40²µ/1Β½΄Η³ϊ panko breadcrumbs
60g/2ΒΌoz frozen peas, defrosted
splash white wine (optional)