It is easy to make jelly from jam. The dessert can be made from the remains of any jam or marmalade, even old (but make sure there is no mold on it). According to the recipe, gelatin is added to the jelly from jam. It is better to take instant gelatin. Then you will not have to waste time soaking it.
Step 1

Make the jelly. Pour hot water into a saucepan, add jam. Stir until smooth. Put the saucepan on low heat. Pour in the instant gelatin. Stir until the gelatin dissolves. Do not bring to a boil. Remove from heat and cool for 15 minutes. Pour the mixture into molds. Put in the refrigerator for 3 hours.