陆 small lemon, finely grated zest only (optional)
50g/1戮oz baby spinach leaves
sea salt and freshly ground black pepper
20驳/戮辞锄 cornflour
300ml/10fl oz semi-skimmed milk
15驳/陆辞锄 Parmesan, finely grated
300g/10陆oz mixed fish, including smoked haddock, cod and salmon, thawed if frozen
1 thin slice white or brown bread
100g/3陆oz frozen peas, to serve