8 cardamom pods, seeds only
1 generous blade mace
5 Sichuan peppercorns
8 tbsp white caster sugar
2 tbsp sea salt
½ watermelon, cold from the fridge
Juice of 1 red grapefruit
4 tbsp fresh lime juice (from about 2 limes – keep the skins)
Tonic water, to top
I know this sounds like a cheese-and-banana sandwich of a combination, but I promise the bitterness of the tonic makes everything sit up straight. These quantities make way too much spicy sugar, but you need a certain amount to make it grind well, it keeps for ever and it’s amazing on hot buttered toast.
From Mark Diacono
Put the spices and sugar in a spice or coffee grinder and reduce to a fairly fine dust. Combine with the salt and scatter a little on to a saucer.
Scoop the watermelon flesh into a blender and blitz smooth. Sieve into a jug, using a spoon to encourage the juice to run through, then stir in the grapefruit and lime juice.
Run a piece of lime around the rim of each glass, then dip the rim into the spicy sugar. Half-fill the glass with watermelon juice, then dilute with tonic water to taste.