It's a Yorkshire saying where Wensleydale cheese is traditionally eaten with apple pie - usually a shallow pie baked on a plate. The apple of choice is usually a Bramley, which is a good keeper and turns to a puree when cooked. Wensleydale is the best cheese for eating with Apple pie or with a Ribston Pippin, the Yorkshire Apple. It's also eaten with Ganton cake, a fruit cake from the village if Ganton.