Step by step
Press down and place a saucer on the top, weighed down with something heavy. Place in the fridge for one day.
Tips
If you use fresh fruit instead of frozen, you may need to add some water during cooking, since frozen fruit contains much more liquid.
Trivia
The word 'pudding' in English can refer to both savoury and sweet dishes, whereas in Italian the former would be called 'pasticcio' or 'sformato'.