Cook the glass noodles according to package directions. While the noodles are cooking, place all of the dressing ingredients in a blender and blend until smooth. Set aside.
Crush the peanuts into medium-small pieces, not completely ground up.
When the noodles are done cooking, drain and rinse in cold water. Place the noodles in a large bowl. Add the coleslaw mix, chopped mango, cucumber, cilantro, grated ginger, and crushed peanuts to the bowl. Pour half the dressing in the bowl. Toss to combine, adding a little more dressing as needed. Reserve some if you're not serving right away and add right before serving.