First of all cut the cake you are using into cubes or you can't cut into small roundels and place in in the individual disposable wine glasses.

In an electric mixer start whipping the heavy cream with the pastry cream powder and whip it until it is blended well. Add powdered sugar to it and blend a few times more. The consistency shouldn't be too thick. It should be a little runny so it seep through the cake.

Cut the fresh strawberry slices and set aside.

Now we are going to assemble it all together. You have already placed the cake in the cups and now we will be pouring the pastry cream, say about 2-3 tablespoons or more. Then place 2-3 slices of strawberries along with a few pieces of cake.

Then pour more cream on top it. Now using a piping bag and the tip of your choice, make a rosette with whip cream on top. Place blueberries however you want it to get the desired look.

Place it in the refrigerator for a few hours so that the cream seeps through and everything is set. Serve cold.