A tried and tested grapefruit marmalade recipe that a friend gave me and which I have tweaked a bit.
Ingredients :
3 grapefruits (~800g)
850g sugar
juices from 2 lemons
Method :
1) Put the grapefruits in a pot, add in enough water so that the grapefruits are able to float freely. Bring to a boil till for 2 hours.
Note : Water need to be replenished every now and then.
2) Remove the grapefruits from the pot and let cool.
3) Chop the grapefruits thinly, remove the pith and put the chopped grapefruits back into a clean pot.
4) Add in the lemon juice and sugar.
5) Let the sugar dissolve and stir constantly.
6) Bring the mixture to a boil till it reaches the setting point of 110 deg C.
Note : If you do not have any thermometer, drop a little of the mixture onto a plate that has been put in the freezer beforehand. Let chill for 1 - 2 mins. Push the mixture with your finger. If the surface wrinkles, it means the setting point has been reached. Otherwise keep heating and repeat the testing procedure.
7) Ladle into mason jars, cover and leave to cool completely.
The jam sets perfectly. It is not too sweet and leave a little bitter after taste, which is not unpleasant.
