I first learned of the existence of Waldorf salad from Fawlty Towers. Like Basil, I had no idea what it was:
Customer: “Could you make me a Waldorf salad?”
Basil: “Waldorf salad. I think we’re just out of Waldorfs.”
But by the end of the episode – unlike Basil – I was pretty clear on how to make one:
Customer: “No! No cheese! It’s celery, apples, walnuts, grapes!”
Basil: “Right!”
Customer: “In mayonnaise!”
Basil: “Right!”