Courgette and lime marmalade

Inspired by a recipe idea  on the Abel & Cole website, I experimented with courgette and lime marmalade. It's really rather nice!  I'll be making more when I get home, but only made an experimental jar and a bit while in my holiday kitchen. 1 lb peeled courgette/marrow, coarsely grated 1lb granulated sugar zest and juice of two limes juice of 1/2 lemon Put everything into a wide topped pan (use a jam  pan for larger quantities), and cook gently over a low heat, stirring, until the sugar is dissolved. Turn up the heat, bring to a rolling boil and continue to setting point.  Remove from heat, stand for five minutes, then pour into prepared jars and seal. label when cool, store in a cool place.