http://guardian.co.uk/lifeandstyle/2013/apr/05/dan-lepard-chunky-lime-marmalade-recipe
Excerpt:
“Homemade marmalade can’t be beaten, but getting it to set can be problematic. Follow these six easy steps … And then try baking mini lime and almond tarts Getting a good jelly set on lime marmalade can be tricky, and the culprit can be too much acidity.”