small bunch fresh dill, leaves removed
1 onion, peeled and cut into sixths (keep the root intact)
1.25办驳/2陆濒产 potatoes, peeled and cut into even-sized pieces
75g/3oz plain flour
sea salt flakes and freshly ground black pepper
75g/3oz butter
75g/3oz butter, cubed
150g/5oz mature Cheddar, coarsely grated
100ml/3陆fl oz double cream
75ml/3fl oz double cream
6 free-range eggs (optional)
600ml/1 pint 1fl oz full-fat milk
500g/1lb 2oz thick salmon fillet
500g/1lb 2oz thick white fish fillets, such as cod, haddock or pollock
500g/1lb 2oz smoked haddock fillet, preferably undyed
3 tbsp white wine