Bring a small pot of water to a boil and carefully lower the egg into the water; cook for 6 minutes, then immediately transfer to an ice bath.
In a medium saucepan, bring the beef bone broth to a gentle simmer over medium heat.
Whisk the sriracha, tamari, garlic powder, and ginger powder into the simmering broth until well combined.
Thinly slice the pork tenderloin and finely dice the pork belly, then season both with sea salt and black pepper.
Heat the toasted sesame oil in a skillet over medium-high heat and sear the pork pieces until the belly is crispy and the tenderloin is golden and cooked through.
Add the brown rice ramen noodles and the baby bok choy to the broth, cooking for 3 to 4 minutes until the noodles are tender.
Peel the cooled egg and slice it in half to reveal a jammy center.
Ladle the noodles, bok choy, and spicy broth into a deep bowl.
Top the ramen with the seared pork slices, crispy belly bits, the halved egg, and fresh scallions before serving.