Photograph: Jonathan Gregson
Preheat the grill to a high setting. Tip the pineapple chunks (and any juice) into a bowl with the sugar.
Put the vanilla seeds in a small dish with the orange juice and mix together.
Pour the vanilla liquid into the bowl with the pineapple and add the star anise. Toss together, then tip the whole lot into a shallow ovenproof dish.
Grill the pineapple for 15 minutes, turning it two or three times and basting it with the sugary juices. Eat warm with the vanilla ice cream.