Bring a pot of water to a boil and cook the soba noodles according to package directions, then drain and set aside.
In a large skillet over medium-high heat, cook the ground turkey until browned and cooked through, breaking it into small crumbles.
Add the minced garlic, grated ginger, and crushed Sichuan peppercorns to the turkey, sautéing for 1 minute until fragrant.
Toss in the baby bok choy and cook for 2 minutes until the leaves are wilted and the stems are slightly tender.
In a small bowl, whisk together the tahini, tamari, rice vinegar, and chili oil to create a smooth, spicy sauce.
Add the cooked noodles to the skillet and pour the sauce over the mixture, tossing everything together until well-coated.
Garnish with sliced green onions and serve immediately in a warm bowl.