Sunny Citrus Cubes

Pour the boiling orange juice into a bowl and sprinkle the unflavoured gelatin over the surface, letting it sit for 1 minute to bloom.

Stir the mixture for 2 minutes until the gelatin is completely dissolved, ensuring no lumps remain.

Add the grapefruit juice, orange extract, and sugar to the dissolved gelatin, stirring well to combine all ingredients.

Pour the mixture into a shallow baking dish or container and refrigerate for 3-4 hours until set but still slightly jiggly, not completely firm.

Once partially set, cut the gelatin into small cubes using a sharp knife, working quickly and dipping the knife in warm water between cuts to prevent sticking.

Transfer the cubes to a serving dish and sprinkle with chopped walnuts if desired, then chill until ready to serve.