Cook noodles according to package directions in salted water just until al dente. Drain and set aside. Meanwhile: While the chicken is still on the cutting board, pat it dry with paper towels. Toss it with all of the chicken seasonings (ginger, garlic powder, ground coriander, ground turmeric, salt, pepper); set aside.
Whisk all of the sauce ingredients together in a medium bowl; set aside. Heat 2 tablespoons olive oil in a large skillet over medium-high heat until hot and rippling. Add chicken and cook until opaque (chicken will not be cooked through). Add coleslaw and cook one minute.
Add the sauce and simmer until chicken is cooked through and sauce is thickened, 3-5 minutes. Stir in peanut butter until melted.
Add the noodles and toss until evenly coated.
Season with salt and pepper to taste. Serve immediately, garnished with cilantro and peanuts, if desired.