Originally Posted by
jeebus
Grilled cheese sandwiches are often made with mayo as a browning/crisping agent. You may not make it that way yourself, but if you've ever ordered a grilled cheese in a restaurant, there's a good chance you did eat one with some mayo on it.
Among many recipes (and debates) online, see for example:
https://www.today.com/food/martha-st...e-ever-t105748
LOL, thankfully most restaurants do not follow Martha Stewart cooking tips. Even if mayonnaise is used which I doubt, it would cooked eggs, oil and vinegar which completely changes the taste and texture of mayonnaise which is a raw emulsion of ingredients.