Authentic Welsh Glamorgan Sausages (Leek & Caerphilly Cheese)

Sauté finely chopped leeks in butter until soft. Let cool.

Mix the leeks with grated Caerphilly cheese, breadcrumbs, parsley, and a pinch of mustard powder.

Add egg yolks to bind the mixture into a thick paste.

Shape into sausages, then coat in flour, beaten egg, and extra breadcrumbs.

Fry in a little oil until golden brown and crispy on the outside.