Bring a medium pot of water to a boil and cook the soba noodles according to package directions until al dente, then drain and set aside.
In a small bowl, whisk together the tahini, tamari, rice vinegar, toasted sesame oil, and chili crunch until the sauce is smooth and emulsified.
Heat a large non-stick skillet over medium-high heat and add the ground turkey, breaking it up with a spatula as it browns.
Stir in the minced garlic, grated ginger, sea salt, and black pepper, cooking for 2 minutes until fragrant.
Add the chopped baby bok choy to the skillet and sauté for 3-4 minutes until the leaves are wilted and the stems are crisp-tender.
Add the cooked soba noodles and the prepared sauce to the skillet, tossing everything together until the noodles are well-coated and heated through.
Garnish with sliced green onions and serve immediately in a warm bowl.