Zest the ruby grapefruits before peeling if you are making the companion shortbread recipe. Cut off both ends of the grapefruits and use a paring knife to carve off the peel and pith.
To supreme the grapefruit, run the blade of the knife down the membrane separating the segments towards the centre. Release the segments into a bowl to catch the juice. Reserve the juice and discard the seeds.
Wash and hull 500g of fresh strawberries, then halve, quarter, or slice them.
Grind or crush 1 tablespoon of pink peppercorns to yield 1 rounded teaspoon.
In a medium bowl, combine the grapefruit segments, strawberries, and ground pink peppercorns.
Add 2 tablespoons of St Germain or elderflower cordial, if using.
Add 2 tablespoons of pure icing sugar and the 2 tablespoons of reserved grapefruit juice.
Cover and refrigerate until required.