A while back, I read and bookmarked a recipe on the kitchn for "spiced apple jellies." This is a classier way of saying make-your-own apple juice jello (with agar). I loved jello-esque things, but I don't like apple juice, so I decided to try the recipe with apple cider once when I had family coming to visit.
It was a success!
I always find agar to be firmer than I want it to be; next time I might try less (so a scant teaspoon). Also next time, I'm going to take a tip from them and serve it in cute little mugs; I just didn't own cute little mugs at the time of making these.