These are new to Costco Food Court in the UK. Tried one earlier and it was amazing!
Compared to other items like hot dogs, pizza, jacket potatoes this may seem a little expensive. However this was deep filled with Korean style Bulgogi which is basically thin marinated strips of beef with spring onions and mozzarella cheese wrapped inside costcos pizza style dough.
Not sure who came up with the idea or why they are even selling this in the UK but its seriously worth a try!