30g/1oz semolina
salt and freshly ground black pepper
1 tsp mustard powder
15²µ/½´Ç³ú poppy seeds
50²µ/1¾´Ç³ú self-raising flour, plus extra for dusting
15²µ/½´Ç³ú walnuts, finely chopped
75²µ/2¾´Ç³ú butter, diced
1½ tbsp beaten free-range egg white
50²µ/1¾´Ç³ú Parmesan, finely grated