Rinse konjac noodles thoroughly in a fine-mesh sieve under cold water for 2 minutes, then boil for 2 minutes and drain.
Pat the noodles dry with a clean kitchen towel to remove excess moisture and set aside.
In a small bowl, whisk together peanut butter, tamari, rice vinegar, sriracha, and minced ginger until smooth.
Season the diced chicken breast with sea salt and black pepper.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sauté until golden brown and cooked through, about 5-7 minutes.
Add the broccoli, sliced bell pepper, and minced garlic to the skillet, stir-frying for 3-4 minutes until vegetables are tender-crisp.
Add the prepared konjac noodles and the peanut sauce to the skillet.
Toss everything together for 1-2 minutes until the noodles are heated through and the sauce is thick and velvety.