Pineapple & pink grapefruit with mint sugar

Use a sharp knife to top and tail the pineapple, then stand it upright on a chopping board. With the sharp knife, carve the skin away and discard. Rest the pineapple on its side, then cut into wafer-thin slices. Repeat with the grapefruit, cutting away the peel and pith, then cut into slices. Arrange the fruit on a serving platter, catching any juices, and set aside.

Using a pestle and mortar, pound the sugar and mint together until completely blended. Scatter the mint sugar over the fruit and serve with yogurt.