Bring a small pot of water to a boil and cook the egg for 6.5 minutes, then immediately transfer to an ice bath, peel, and set aside.
Slice the pork tenderloin into very thin strips and season with sea salt and black pepper.
Heat the toasted sesame oil in a medium pot over medium-high heat and sear the pork strips until golden brown.
Add minced garlic and grated fresh ginger to the pot, sautéing for 1 minute until fragrant.
Pour in the chicken broth, tamari, and sriracha, bringing the mixture to a gentle simmer.
Add the brown rice ramen noodles to the broth and cook according to the package instructions, usually about 4 minutes.
During the last 2 minutes of noodle cooking, stir in the chopped baby bok choy until just wilted.
Ladle the soup into a bowl, slice the soft-boiled egg in half to place on top, and garnish with sliced green onions.