Asian Pear Sauce:
In a large saucepan combine 1 pound cored Asian pears, 1 small cored Fuji apple, 2 tablespoons water, 1 1/2 teaspoons lemon juice, 1/2 teaspoon vanilla, 1/4 teaspoon ground cinnamon, and 1/8 teaspoon kosher salt. Bring to boiling; reduce heat to low. Simmer, covered, 30 to 40 minutes or until fruit is very soft, stirring every 10 minutes. Uncover. Let cool. Transfer to a blender. Blend until smooth.
Sift 1 teaspoon culinary matcha powder into a small bowl and stir in 1 tablespoon kosher salt. Sprinkle over latkes just before serving.