Cook the rice noodles according to the package directions. Drain, and rinse with cold water. Drain again and divide between four bowls.
In Dutch oven, heat the oil on medium low heat. Add the lemongrass, ginger, garlic, scallions, jalapeno, and lime zest and cook for three minutes.
Add the chicken stock and bring to a simmer. Remove the lemongrass and ginger. Add the shrimp, fish sauce, sugar, lime juice, and sesame oil and simmer until the fish are opaque for about five minutes.
Divide the carrots, red pepper, cilantro, and basil between the four bowls. Then, add soup and shrimp to each bowl and serve. Sprinkle some red pepper flakes on each serving.