Boil soba noodles in water for 4-5 minutes until tender, then drain and rinse with cold water to prevent sticking.
Heat the avocado oil in a large wok or skillet over medium-high heat.
Add the cubed chicken breast to the pan, seasoning with sea salt and black pepper.
Sear the chicken until it is golden brown and cooked through, then remove it from the pan and set aside.
Add the broccoli, bell pepper, and carrots to the same pan, stir-frying for 3-4 minutes until they are crisp-tender.
Stir in the minced garlic and fresh ginger, cooking for 60 seconds until the aroma is released.
Return the chicken to the pan and add the cooked soba noodles, tamari, and sesame oil.
Toss all ingredients together for 2 minutes until the noodles are heated through and evenly coated in the sauce.