Love grilled cheese sandwiches. Hold the onion, though. Pork pie sounds like it could be good, depending on how it's done. I've never tasted or even smelled any Indian food that I would dare go near again. And I was once married to a woman of East Indian descent (Guayanna). Couldn't stand that curry. Made her promise she'd never cook with it in the house. She didn't cook all that much anyway. But whenever we ate at her relatives' houses, and that was too often, IMO, I was forced to eat the stuff. Nice people, in any case. Just hated their food with a passion.
An onion and cheddar sandwich is this: sliced red onion on a mound of shredded cheddar. Dry white bread. That’s all. As to a pork pie - google a traditional British pork pie. The British have a real thing about TRADITION with their food.