Bring a small pot of water to a boil, carefully lower the egg into the water, and simmer for exactly 6.5 minutes before transferring it to an ice bath to cool.
In a medium pot over medium-high heat, add the sesame oil and brown the ground pork with sea salt and black pepper until fully cooked and slightly crispy.
Add the minced garlic and grated ginger to the pork, sautéing for 1 minute until the aromatics are fragrant and softened.
Pour in the chicken broth, tamari, and sriracha, stirring well to combine and bringing the liquid to a gentle simmer.
Add the dry soba noodles and chopped bok choy to the simmering broth, cooking for 4-5 minutes until the noodles are tender and the greens are wilted.
Gently peel the cooled egg and slice it in half lengthwise to reveal the soft, jammy yolk.
Ladle the pork and noodle mixture into a deep bowl, top with the egg halves and fresh scallions, and serve immediately.