I normally make my own vinaigrette, but (for reasons of laziness) I always keep a bottle of 'ready made' in the house as well. My current choice being either Maille's Balsamic and Orange, or Passion fruit and Mandarin; both very pleasant.
Many years ago I encountered one of those people that one regrets having said 'hello' to for ever after. He was a very ugly, youngish American from Brooklyn, who viewed everything, everywhere, and everyone (outside of the USA) as being desperately in need of his pedagogical enlightenment; I'm sure you know the type.
He imposed himself on me in that 'how can you possibly live without my advice' kinda way. I couldn't get rid of him. He was also an unashamed liar; something that I really detest.
One day whilst I was preparing a simple salad for lunch, I was offered some of his extra-special New Yorker wisdom....
Him: Hey Cro (you have to imagine that grating acidic Brooklyn accent), you know what we do back in the States.
Me: No, what's that Smartarse?
Him: We make something called a Vinny-Gretty.
Me: Really? Sounds good!
Him: We take Oil and Vinegar, Salt and Pepper, and a little Mustard, mix it up, and pour that over the salad.
Me: Wow, that's amazing. And what's it called again?
Me: I really must remember that; thank you so much.
Him: You're welcome.
What would I have done without this radical piece of advice! Even though I still follow his essential teaching, I do have that 'ready made' bottle close at hand, just in case I should forget his wonderful All-American recipe.
N.B. My apologies to all other Americans, who probably find this type of fellow citizen as equally obnoxious as I do. Those of his ilk should never be issued with Passports!