In Yorkshire where I grew up,
creamy curd tarts remain a favourite speciality and are very much a Yorkshire delicacy sold in bakers' shops throughout the county. I love the moist texture of the filling encased in crisp golden pastry - and the fact that the recipe has hardly changed since its creation in the Middle Ages.
Curd cheese is similar to cream cheese, but has a lower fat content. It's made from pasteurised milk and is available in both low and medium fat versions and has a mild, tangy flavour. If you can't find curd cheese, cottage cheese can be used instead, but it must be sieved first. The result will not be as rich, but will still taste delicious.
As ever, using butter (not margarine), free range farm eggs and fresh curd or cream cheese makes a huge difference to the taste. Curiously, some old English cheesecake recipes omitted cheese completely! One example is a lemon cheesecake created in the late 17th century. The filling consisted of pounded lemon peel, egg yolks, sugar and butter and this mixture is still known today as 'lemon curd' or 'lemon cheese'.