1. Heat together 200 ml of the milk and the sugar.
2. Place the gelatin sheets in cold water to soften.
3. Add softened gelatin to the milk and sugar mixture. Mix well.
4. Add the remaining milk and the vanilla.
5. Mix and pour into a mould of your choice.
6. Allow to stand in the fridge for 3 hours in order to cool and set. Serve with the red grapes.