While the Net provides for a bunch (pun intended) of herbal jams and jellies, I've based mine on various recipes and came to a combination and proportion which suits me, personally. Should anyone consider this to be a copycat, I've included this hashtag, just in case. The purple basil here creates a wonderful colour, although using the lemon basil or chocolate basil (yes, such a variety exists!) would obviously make a difference. I'd also recommend smallest jars.