1. Soak the gelatin in cold water, then melt it in a pot to create a gelatin liquid.
2. Cut the mango into pieces, blend with milk to make a mango puree, then add the gelatin liquid and mix well.
3. Whip the heavy cream and sugar until thick. Add the mango puree and mix well. Transfer the mixture to a piping bag and squeeze into dessert cups.
4. Refrigerate for 4 hours.
5. Remove from the refrigerator and decorate with mango chunks and jelly.
