Boil a pot of water and cook the soba noodles according to package directions, then drain and set aside.
In a small bowl, whisk together the tahini, tamari, chili oil, rice vinegar, and ground Sichuan peppercorns until a smooth sauce forms.
Heat a large non-stick skillet over medium-high heat and add the ground turkey, breaking it into small crumbles as it browns.
Season the turkey with the sea salt, black pepper, minced garlic, and grated fresh ginger, sautéing for 2 minutes.
Add the chopped bok choy to the skillet and cook for another 2-3 minutes until the leaves are wilted and the stems are tender.
Reduce the heat to low and add the cooked soba noodles along with the prepared tahini sauce to the skillet.
Toss all ingredients together thoroughly until the noodles are evenly coated and the dish is heated through.
Garnish with thinly sliced green onions and serve immediately in a warm bowl.