In a blender, combine the ginger, soy sauce, sesame oil, peanut butter, sugar, vinegar, rice wine, garlic, sesame paste, shallot and 3 tablespoons of the peanut oil and puree until smooth. Transfer the sauce to a bowl and refrigerate for 45 minutes.
In a large pot of boiling water, cook the noodles until al dente. Drain and rinse under cold running water until chilled. Shake out the excess water and blot dry; transfer the noodles to a bowl and toss with the remaining 2 tablespoons of peanut oil.
Add the peanut-sesame sauce and toss well to coat. Garnish with the cilantro, cucumber and scallions.
