1 unwaxed lemon, juice and finely grated zest
1 tbsp Dijon mustard
salt and freshly ground black pepper
300ml/10陆fl oz rapeseed oil
500g/1lb 2oz wholegrain rye flour, plus extra for dusting
10g salt
25g/1oz dark brown muscovado sugar
2 tbsp cider vinegar
10g fast-action dried yeast
200g/7oz unsalted butter, softened
3 free-range egg yolks
200g/7oz cooked brown shrimps
12 razor clams, scrubbed
400g/14oz clams in their shells, scrubbed
1 medium-sized cooked brown crab
12 langoustines
1 x 1kg/2lb 4oz cooked lobster
8 oysters, shucked