Thanks for replies Mrs James - ooh the pic of battenburg, stop it cos I want some now!
My ceramic burner only has a smallish well at the top which is why I broke off just some of the tart (don't mind this at all cos quite fancy being able to pick and choose flavour each time). What I didn't understand was why it solidified. I assumed it would stay liquid until the tealight went out? So does yours always stay liquid?
Actually my burner seems very non stick and it popped out no prob at all which is good cos I didn't want hassle that end of things. I just need to understand them and then I look forward to trying more.