Boil water in a small pot and cook the soba noodles according to package directions; drain and set aside.
Heat a large skillet over medium-high heat and add the ground beef, breaking it apart with a spatula.
Season the beef with sea salt and black pepper, cooking until browned and no longer pink.
Add the diced yellow onion and red bell pepper to the skillet, sautéing for 3 minutes until softened.
Stir in the broccoli florets, minced garlic, and grated fresh ginger, cooking for another 2 minutes until fragrant.
Pour in the tamari, sesame oil, and beef broth, scraping the bottom of the pan to release any browned bits.
Add the cooked soba noodles to the skillet and toss everything together until the sauce coats the noodles and the broccoli is tender-crisp.
Serve hot directly from the skillet for a clean, protein-packed meal.