Bring a pot of water to a boil and cook soba noodles according to package instructions, adding chopped bok choy during the final minute.
Drain the noodles and bok choy, then set aside.
In a small mixing bowl, whisk together the tahini, tamari, rice vinegar, and ground Sichuan peppercorns until a smooth paste forms.
Heat avocado oil in a large skillet over medium-high heat and add the ground turkey.
Sauté the turkey until browned and cooked through, breaking it into small crumbles.
Stir in the minced garlic and grated ginger, cooking for 60 seconds until the aroma is released.
Season the turkey mixture with sea salt and black pepper.
Add the cooked noodles and bok choy to the skillet, pouring the prepared tahini sauce over the top.
Toss everything together until the noodles are thoroughly coated and heated through.
Transfer to a bowl and garnish with chili oil and sliced green onions.