Boil water in a medium pot and cook soba noodles according to package directions, adding the baby bok choy during the last minute of cooking.
Drain the noodles and bok choy, then set them aside.
In a small bowl, whisk together the tahini, tamari, chili oil, rice vinegar, and grated fresh ginger until smooth.
Heat the sesame oil in a large skillet over medium-high heat.
Add the ground turkey, minced garlic, and crushed Sichuan peppercorns to the skillet.
Sauté the turkey until it is fully cooked through and starts to develop slightly crispy, golden edges.
Reduce the heat to low and pour the prepared sauce over the turkey, stirring to coat the meat evenly.
Add the cooked noodles and bok choy to the skillet, tossing everything together until well combined and heated through.
Garnish with sliced green onions and serve immediately.