Convert the following instructions to prepare the recipe into passive voice .

1. Take 2 apples cut them into small slices.
2. Boil 4 glasses of milk in a bowl.
3. Add sugar to the milk
4. In a cup take 2 spoons of custard powder and half cup milk and stir till it mixes well.
5. Add this mixture to the milk in he bowl and keep stiring for 6 mins .
6. Put the burner off and let the custard cool down
7. Finally add the apples to the custard and allow it to cool in he frizzer for an hour.
8. Serve the custard in small bowls.

1.  2 apples need to be taken and cut into small slices.
2. 4 glasses of milk is to be boiled in a bowl.
3. Sugar needs to be added to the milk.
4. 2 spoons of custard powder is taken in a cup along with half cup milk and stirred to mix well.
5. This mixture is added to the milk in the bowl and kept stirring for 6 minutes .
6. The burner is switched off and the custard is allowed to cool down.
7. Finally, the apples are added to the custard and allowed to cool in the freezer for an hour.
8. The custard can be served in small bowls.