Cook soba noodles in boiling water according to package directions, then drain and set aside.
Season the diced chicken breast with sea salt and black pepper.
Heat avocado oil in a large skillet over medium-high heat and sauté the chicken until golden and cooked through.
Steam the broccoli florets until they are tender-crisp and bright green.
In a small jar, whisk together the coconut aminos, toasted sesame oil, rice vinegar, minced garlic, and grated ginger.
Combine the cooked noodles, chicken, and broccoli in the skillet over low heat.
Pour the garlic-sesame sauce over the mixture and toss until every strand is coated and fragrant.
Serve warm, garnished with sliced green onions and a sprinkle of sesame seeds.