To make the dressing, heat the sesame oil in a small saucepan.
Add the ginger and garlic and take the pan off the heat.
Whisk in all the remaining ingredients for the dressing and set aside.
Cook the noodles in a pot of boiling water with lemongrass blades, as per the package directions, and drain well.
Toss with 1 tablespoon sesame oil and then transfer them to a large salad or mixing bowl.
Stir half the dressing into the hot noodles.
Now toss in all the veggies except the cucumbers. Allow the noodles to cool to room temperature and then cover and refrigerate. Also refrigerate the cucumbers and leftover sauce.
Just before serving, toss the salad with the remaining sauce and the sliced cucumbers.
Garnish with the roasted peanuts and sesame seeds and serve cold.