This simply prepared dish has a lovely, delicate fusion of flavours. It is perfect summer food.
Roughly crush the green peppercorns and the coriander seeds and put them into a bowl or jug with the saffron strands. Put the wine into a saucepan with the sugar and bring the wine just to the boil, then pour it immediately on to the peppercorn mixture. Leave the mixture to cool, stirring now and then to infuse the flavours.
Meanwhile, put the tomatoes into a bowl. Pour over enough boil