01 - Wash, peel, and dice the strawberries, kiwi, mango, and pineapple into small, bite-sized pieces. Rinse the blueberries and pat dry. Set all prepared fruits aside.
02 - Combine the water and agar agar powder in a medium saucepan. Whisk thoroughly to disperse the powder and prevent clumping.
03 - Bring the mixture to a boil over medium heat, stirring constantly. Reduce heat and let simmer for 2 minutes until the agar agar is completely dissolved and the liquid is clear.
04 - Stir in the granulated sugar and continue mixing until fully dissolved. The liquid should remain smooth and free of any granules.
05 - Remove from heat and stir in the fruit juice until well incorporated. Let the mixture cool for 2-3 minutes, but do not allow it to begin setting.
06 - Distribute the prepared diced fruits evenly across the bottom of a silicone mold or glass dish. Gently press down to create an even layer.
07 - Carefully pour the warm agar agar mixture over the arranged fruits, ensuring all fruit pieces are submerged. Use a spoon to gently reposition any floating fruit.
08 - Allow the jelly to cool to room temperature, then refrigerate for at least 45 minutes or until completely firm and set.
09 - Gently unmold the jelly or cut into cubes. Serve chilled for the best texture and flavor.