Place an empty bowl in the freezer, for whipping cream in it.
Take another bowl and place the cakes cubes or crumbled cake evenly so that the bottom of the bowl is covered completely.
Mix the diluted orange juice with water and keep aside. Mix the chopped fruits. Add the orange juice into it and mix well. Spread this over the cake layer.
Make the jelly according to instructions given on the pack. Pour the jelly over fruit layer evenly. Allow to set. It should not take more than 30 minutes.
Meanwhile, take a small bowl and mix the custard powder with a little milk to form a lightly loose paste. Heat the remaining milk and sugar in a pan and bring to a boil. Add the custard powder paste into it and continue stirring, till the mixtures thickens.
Pour the custard over the set jelly layer and allow to cool. Once cool, place this in the refrigerator till set.
Take the chilled bowl from the freezer and pour the whipping cream into it. Beat it to soft peaks with a hand mixer. Slowly add the powdered sugar and continue beating till you get stiff peaks.
Transfer the whipped cream on top of the custard layer and spread evenly. Refrigerate. Garnish with sliced fruits and serve chilled.