Combine chicken and marinade ingredients and set aside for at least 20 minutes.
Combine the Nuoc Cham ingredients and mix well to dissolve the sugar. Adjust to your taste (spiciness, lime, sweetness) and set aside.
Soak the vermicelli noodles in hot water for 3 minutes (or according to packet instructions), then drain and rinse under cold water to stop the noodles from sticking together.
Heat the 1/2 tablespoon oil in a fry pan over medium heat. Remove chicken from marinade and place chicken in the pan and cook each side until dark golden brown and chicken is just cooked through, about 6 to 8 minutes. Remove from pan and set aside to rest for 5 minutes. Then slice into thin pieces.
Divide the noodles between 2 bowls. Then either top or lightly toss through the vegetables and herbs and top with chicken pieces. Drizzle with a few tablespoons of Nuoc Cham Sauce and serve with lime wedges.