I've just made some plum jelly (and plum jam, spiced ...you name it... plums in any other form, as a neighbour very kindly dumped a bucket load on me, bless him!)
I halved and de-stoned some plums and cooked in just enough water to cover (I'm not good with weights and measures...sorry!) Simmer gently until plums are soft.... a puree-like texture. Strain through a jelly bag (posh term) A piece of muslin, or in my case, a small piece of left-over white sheeting placed in a colander or a large seive will do.Leave to drain overnight.... do not squeeze, patience is a requirement! You should be left with a clear plum flavoured liquid.Measure the liquid into a saucepan, and for every 250 ml of juice add 250 grams. sugar, warmed if you wsh. Bring slowly to the boil. stirring to make sure all the sugar has dissolved before brinigng to a 'rolling' boil.After about 10 minutes begin to check temp with either a jam thermometer (110c) or the tried and trusted spoonful on a chilled saucer (although not by me... never seems to work!) keep checking until you reach that magic number and then remove form heat and pour into sterilised jars. and.... Viola!!
This basic jelly is great for adaptation...... a few pieces of star anise, or some whole clovse added to the boiling process can make it an ideal 'tool' in the storecupboard for adding to sauces for pork, roast duck, venison... even the Christmas turkey it's so versatile .
Bon appetit!