Bring a medium pot of water to a boil and cook the soba noodles according to package directions, then drain and set aside.
In a small bowl, whisk together the tahini, tamari, toasted sesame oil, chili garlic sauce, and ground Sichuan peppercorns until smooth.
Heat a large skillet over medium-high heat and add the ground turkey, sea salt, and black pepper, breaking it up with a spatula until browned and cooked through.
Add the minced ginger and garlic to the skillet, sautéing for 1 minute until fragrant.
Toss in the chopped baby bok choy and cook for 2 minutes until the leaves are wilted and the stems are tender-crisp.
Add the cooked soba noodles and the prepared sesame sauce to the skillet, tossing everything together until well-coated and heated through.
Garnish with sliced green onions and serve immediately.