
Make the jelly. Place the grapes in a deep saucepan and place over low heat. Heat the grapes for 10-15 minutes until they release juice and become soft. Remove from heat. Stretch cheesecloth over a bowl. Place the grapes in the cheesecloth in portions, squeezing out the juice. Discard the pulp. Pour the juice into a saucepan and place over heat. Bring to a boil. Add sugar and stir until completely dissolved. Do not bring to a boil. Turn off the heat.

Pour the mixture into sterilized jars. Screw or roll up the lids tightly. Place a towel on the bottom of a large saucepan. Place the jars in the saucepan. Pour in water so that it reaches the "shoulders" of the container. Put on the fire and bring to a boil. Boil for 10 minutes. Remove the jars, turn upside down. Wrap in a warm blanket and leave to cool. After cooling, put in a cool place.