I found myself obscurely on the daily mail website yesterday (don't hold it against me, I was directed to another article there)... Anyway, there was an article about gross foods from the 50's, 60's, and 70's. Once of the foods was a salad set in jelly... lettuce, greens, all the usual salad bits set into a green jelly (I think it was green). There was also a "cheese salad jelly", which was some kind of monstrosity with cheese in the jelly, set into a mould with a hole in the middle, and seafood salad filling the hole.
I think jelly has far many uses than even you can imagine, Andy.