In a medium bowl, sprinkle gelatin over cold water and let it bloom for 5 minutes.

In a saucepan, combine boiling water, sugar, and sliced ginger. Stir until sugar dissolves, then remove from heat.

Strain the ginger syrup into the bloomed gelatin mixture, pressing the ginger to extract flavor. Stir until gelatin is fully dissolved.

Stir in the lemon juice. Pour the mixture into individual serving dishes or a 9x5 inch loaf pan.

Refrigerate for at least 4 hours, or until the jello is set. Serve chilled.