I had neither heard nor experienced a Tu B'Shvat Seder while growing up in Israel, until my boyfriend at the time when I was 17, extended the invitation. I was perplexed at the custom as well as his parents' gesture.
Please click to read A Tu B'Svat Seder, Sweet and Significant (and get the Honeyed and Spiced Dried Fruit Compote recipe) over at The Jew and the Carrot, even if it is written from my small perspective.
P.S. For those of you who speak Hebrew, and I know there are a handful here, I came across this incredible food travel video in Saloniki, with Chef Haim Cohen and his Shum, Pilpel and Olive Oil (Garlice, Pepper and Olive Oil) show. It's a must watch. I wish they had it with English subtitles!