Bring a small pot of water to a boil, carefully lower the egg into the water, and simmer for 6.5 minutes.
Immediately transfer the egg to an ice bath; once cooled, peel and slice in half to reveal a jammy center.
Cook the soba noodles in a separate pot of boiling water according to package directions, then drain and set aside.
In a medium pot over medium-high heat, add the sesame oil, ground pork, minced garlic, and grated ginger.
Sauté the pork while breaking it into small crumbles until browned and fully cooked, then season with sea salt and black pepper.
Pour in the beef broth, sriracha, and coconut aminos, bringing the mixture to a gentle simmer.
Add the chopped bok choy to the broth and cook for 2 minutes until the leaves are wilted and the stems are tender-crisp.
Place the cooked soba noodles in a deep bowl, pour the spicy pork broth over them, and top with the egg halves and sliced green onions.