In a small bowl whisk together the peanut butter, honey, ginger, rice vinegar, and sesame oil. Add water 1 Tablespoon at a time until you have your desired consistency.In a large bowl, combine romaine, red cabbage, carrots, edamame, red and yellow bell pepper, green onions, and cashews. Toss.Drizzle on the ginger peanut sauce and serve.