Set a pot of water on high heat and bring to a boil, then cook your noodles until JUST al dente, which should take a few minutes less than the packet cooking instructions. When done, immediately drain and rinse with cold water.
Add the fish sauce, lime juice, peanut butter, ground ginger, brown sugar, 1 tablespoon of sesame oil, minced garlic, and cornstarch to medium bowl. Whisk well until ingredients are fully combined and cornstarch is dissolved. Set aside.
Pour 1 tablespoon of the prepared sauce over chicken and toss gently to coat.
Heat 1 tablespoon sesame oil in large heavy skillet over high heat. Add chicken and cook, without stirring, 1 minute, then stir and continue cooking 1 minute or until browned on sides and cooked through. Remove with a slotted spoon and set aside.
To cook the vegetables, add the remaining 1 tbsp sesame oil in a large wok or skillet over medium heat. Add the white parts of green onions and veggies and stir fry until tender, this should take about 5 minutes. Add the garlic and cook stirring constantly 30-60s or until fragrant.
Add the cooked noodles, chicken, and sauce and toss to coat well, allowing all the ingredients to heat through and the sauce to thicken a little until glossy. Divide into serving bowls then top with sliced green parts of green onions, chopped cilantro, and with a lime wedge on the side of each bowl.