2 red chillies, finely chopped (leave the seeds in if you like it hot)
Bring the vinegar and sugar to a simmer
in a big pan. Tip in the pineapple for
1-2 mins, then remove from the heat
and tip into a serving bowl. When almost
cool, stir in the onions and chilli. Cool
completely, then chill (for up to 24 hrs)
until ready to serve.