Cook your soba noodles according to package instructions; drain and rinse under cold water.
Chop kale into bite-sized pieces and finely slice red cabbage.
In a mixing bowl, whisk together white miso, tamari, rice vinegar, minced garlic, grated ginger, and maple syrup until smooth.
Combine cooked noodles with chopped vegetables in a large mixing bowl. Pour the miso sauce over the top and toss gently until everything is well coated.
Serve in bowls topped with sesame seeds, chopped peanuts if desired, and additional herbs.