Peel, core and cut the pineapple into 2 cm cubes.

Juice the limes

Add the Ingredients (pineapple, water, rum, lime juice, sugar) into the goblet.

Blend until smooth.

Pour the mixture into a plastic container.

Cover and freeze.

After 1 hour, use a fork to scrape the frozen parts of the mixture into the middle.

Freeze for at least 4 hours.

Scrape the mixture with a fork to break up.

Serve.