- 1kg rhubarb, weighed after trimming, cut into 3cm chunks
Botanically, rhubarb is a vegetable (it's related to sorrel and dock) but its thick, fleshy…
- 1kg jam sugar (or 1kg caster sugar plus 1 x 8g sachet pectin - we used Tate & Lyle)
Honey and syrups made from concentrated fruit juice were the earliest known sweeteners. Today,…
- 2 vanilla pod, halved lengthways
- juice 1 lemon
Oval in shape, with a pronouced bulge on one end, lemons are one of the most versatile fruits…
Put a small plate in the freezer. Put the rhubarb into a preserving pan or your largest saucepan with the sugar and halved vanilla pods. Heat gently, stirring, until all the sugar has dissolved, then squeeze in the lemon juice and increase the heat.
Boil for about 10 mins, skimming off the scum as you go (the fruit should be soft). Test for setting point by spooning a little onto your chilled plate. After 1-2 mins, push your finger through the jam – if the surface wrinkles it is ready, if not, keep cooking for 2-min intervals, testing in between. (Or if you have a sugar thermometer it should reach 105C)
Once the jam is ready, let it cool for about 15 mins before ladling into warm sterilised jars and sealing. Will keep for 6 months in a cool, dark place.
Wash your jars in hot, soapy water, then leave in a low oven to dry completely. Keep them warm. Alternatively, run the jars and lids through a hot dishwasher cycle, then let them dry.