In a small pot on medium heat make the simple sugar by combining the water and sugar and stirring until dissolved. Remove from heat and allow to cool.
Peel the pears and slice (tip: Use an apple corer for pears too).
In a microwave-safe bowl cook the sliced pears for three minutes, stir and cook an additional three minutes to soften.
In a blender, combine the simple sugar, softened sliced pears, ground ginger, and lemon juice. Blend for at least 30 seconds.
Pour the contents of the blender into a metal cake or loaf pan (or use an ice cream maker according to manufacturer's recommendations), cover with foil, and freeze for four to eight hours. Check every two hours and stir.