As someone who usually does it with a spoon, I have to admit my reaction to seeing Jacques doing a vinaigrette with a jar makes me shout, “Why did I never think of that!”
In fact, this rather makes me wish I had jars in such a size.🤔 My Pyrexes are principally intended for food storage and reheating, so the plastic lids don’t lend themselves to making an emulsion this way. Hmmm….