In a small bowl, whisk together the finely minced lemongrass, minced garlic, grated ginger, sesame oil, sea salt, and black pepper.
Slice the chicken breast into thin bite-sized strips and toss in the marinade; let it sit for at least 15 minutes to absorb the aromatics.
Bring a medium pot of water to a boil, add the rice vermicelli, and cook according to package directions until tender but still firm.
Drain the noodles and rinse immediately under cold running water to stop the cooking process and prevent sticking.
Heat a non-stick skillet over medium-high heat and sauté the marinated chicken strips until golden brown and cooked through, about 5 to 7 minutes.
Prepare the dressing by whisking the fish sauce, lime juice, maple syrup, and minced red chili in a small jar until well combined.
Assemble the bowl by placing the cooled vermicelli at the bottom and topping with the lemongrass chicken, shredded carrots, and sliced cucumber.
Garnish with fresh mint and cilantro, then drizzle the zesty lime dressing over the entire bowl before serving.