Dissolve the gelatin. Take 100 ml of warm water, dissolve the gelatin in it and leave for 15-20 minutes.
Prepare the jelly base. Dilute the jelly in 300 ml of boiling water. Stir well to remove any sugar crystals.
Make a curd-sour cream mixture. Mix the curd with sugar and sour cream in a blender.
Prepare the jelly. In a deep container, combine the liquid jelly, curd mixture and gelatin. Mix thoroughly and pour into moulds. Refrigerate the dessert for 3 hours.