This easy cumquat jam recipe is really quick to make and tastes delicious unlike some kumquat marmalade recipes that can be quite tricky, fiddly and take a lot of time especially when using fruit with seeds.
Place in a bowl, add the water and cover the bowl then set aside over night.
Pour the water and cumquats into a large saucepan, stir in the lemon juice and bring it to a boil.
Reduce the heat to a simmer for 30 minutes or until the cumquats are soft.
Add the sugar and stir until the sugar dissolves then bring to a boil and continue to cook on high, uncovered and without stirring for 20 minutes or until the jam has reached setting point.
To test if it's ready, place a small plate in the fridge. Spoon a little jam onto the plate and put it back in the fridge for a few minutes.
Run your finger through the middle and if the jam stays separated then it is set.
When the jam is ready take it off the heat for 5 minutes and carefully scoop out any pips you can see.
Divide between sterilised jars and seal them up.
Notes
Makes 1.5 litres. Quantities can be increased for larger batches. If you want to remove the pips before making the jam, wrap them in a small piece of cheesecloth and put them in with the cumquats, water & sugar - they are needed to help the jam set. Make sure that your glass jars are freshly sterilised and warm & that your jam is hot when you pour it in. This will keep everything sterile so you can keep the jam shelf-stable for up to 2 years. You can scoop the pips out once the jam is ready if you want to. I find a splade or spork to be really handy for this. Other sugars can be used but will change the colour and taste a little. We like raw or caster sugar as it makes a beautiful vibrant orange jam.