Prepare the watermelon shell

• Cut the watermelon in half and scoop out the flesh, keeping the rind intact as a bowl.
• Blend the flesh and strain the juice through a sieve.

Bloom the gelatin

• Sprinkle the gelatin over the cold water and let it stand until it swells.

Make the jelly mixture

• Warm the watermelon juice with the sugar without boiling.
• Stir in the bloomed gelatin until fully dissolved.

Fill and set

• Scatter the diced fruit into the watermelon shell.
• Pour the jelly mixture over the fruit.
• Chill until completely set.

Serve

• Slice the watermelon jelly into wedges and serve cold.