At a recent wedding (low-scoring on the wedding drinking game, alas), presented with a dinner of chicken breast, new potatoes and carrots, a fellow diner announced proudly that this was a “proper Northern dinner”. Chicken, potatoes and veg! On what basis he was trying to claim something as ubiquitous as that for the North I have no idea. It can’t even be related to portion size as the chicken breast was, well, chicken breast-sized, and the potatoes and the veg were served in a side dish so you could help yourself to as much as you wanted.
This person, in common with many proud Yorkshiremen, lives in London, so presumably is aware that we don’t live on a diet of sashimi and goji berry smoothies down here.