I was in New York recently, and went for breakfast in a diner. My wife ordered an egg sandwich, and although it wasn't specifically listed on the menu, I asked if I could get a bacon sandwich.
The waitress just looked at me for a moment (I found that some New Yorkers seemed confused by my British accent), then said "A bacon roll?". Thinking she meant a bread roll with bacon on it, I said yes.
When the food came, my wife's egg sandwich was exactly what you'd expect. My bacon roll was what seemed to be something similar to an omelette with bacon in it, with a mixture of boiled potatoes, onions, peppers and something other things on the side, plus jam and toast.
So, my questions...
What exactly is an American bacon roll?
What is the accompanying vegetable side dish called, and what are the ingredients?
Additional detail: A sausage roll in England is sausage meat wrapped in pastry but bizarrely, any other roll (e.g. bacon, cheese, ham, tuna, etc) is a filled bread roll, so a sausage roll and a bacon roll have absolutely nothing in common. I wondered if there was a similar oddity with the word roll in the US.
The vegetable dish was roughly cut boiled potatoes (not roasted or browned in any way) with cooked onion, peppers, and some other unidentified vegetables. There were no spices or other seasoning (it was pretty bland), so it doesn't sound like or look like Cajun Home Fries as has been suggested by @Catija.