To prepare dressing, combine first 6 ingredients in a large bowl; stir well with a whisk.
To prepare the salad, crumble noodles; discard seasoning packet. Heat a nonstick skillet over medium-high heat. Add peanuts; saute for 4 minutes or until browned. Remove from heat. Combine crumbled noodles, peanuts, bok choy, and the remaining ingredients in a large bowl. Drizzle dressing over salad; toss gently to coat. Serve immediately.