Make the Orange-Maple Miso Dressing: In a mini or regular food processor, combine the miso, vinegar, sesame oil, tahini, orange juice, water, and maple syrup and process until well combined.
Make the Salad: Cook the soba noodles according to the instructions on the package. Be sure not to overcook them—they should only take 5 to 9 minutes, depending on the brand. Drain the noodles and rinse them under cold water.
Add the edamame, bell pepper, cabbage, cucumber, carrot, green onions, to the bowl with the noodles and toss until well combined.
Pour your desired amount of the dressing over the salad and toss to coat. (Any leftover dressing will keep in an airtight container in the refrigerator for up to 1 week.)
Portion the salad into 2 bowls and garnish each serving with a sprinkle of sesame seeds and some green onions. Serve any leftover dressing on the side.