Put the grapes, kiwifruits and pears in a bowl. Using a teaspoon, scoop the seeds from 3 of the passion fruits into the bowl. Mix 2 tablespoons of the cordial with the measured water and drizzle over the salad. Gently toss together and spoon into 6 glass tumblers.
Stir the remaining undiluted cordial into the yogurt, then mix in the honey. Spoon into the glasses. Decorate with the remaining passion fruit seeds and serve.