The recipe
MAKES about 1kg/2lb 4ozIngredients
Directions
Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.
Put the rinsed grapes, red wine, rosemary sprigs, lemon zest and lemon juice into a large heavy pan with a splash of water. Bring to a simmer over medium heat.
Simmer gently for 20 minutes, pressing the grapes with a potato masher until they burst and release their juice.
Remove the rosemary sprigs. Pour the mixture into a sieve lined with muslin or a jelly bag set over a bowl, and let it drip for about 30 minutes without squeezing.
Wash jam jars and lids in hot soapy water, rinse, then place them upright on a baking sheet in a 275°F (135°C) [oven setting] for 10 minutes to sterilize. Keep them warm.
Return the strained juice to a clean pan. Stir in the jam sugar with pectin until dissolved over low heat.
Bring to a rolling boil over high heat and boil hard for 4 to 6 minutes, stirring occasionally.
Test for setting by spooning a little onto a cold plate; if it wrinkles when pushed, it is ready. Otherwise boil 1 to 2 minutes more and test again.
Skim off any foam, pour the hot jelly into the warm jars, seal, and leave to cool completely before labelling and storing in a cool, dark place.
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