Preheat broiler to high. Combine the miso, honey, garlic and half the oil in a large bowl. Add the chicken and toss to coat. Let marinate for 20 minutes.
Combine the coconut miso dressing ingredients in a mason jar and shake to combine (or combine in a small bowl and whisk.)
Line an oven tray with foil. Place the chicken on it and broil for 4-5 minutes per side or until cooked through. Set aside.
Turn oven to 350. Divide the sweet potatoes between two trays and toss with the remaining olive oil. Roast for 4-5 minutes or until just softened. Place the sweet potatoes, onions and edamame in a large bowl and toss to combine. Slice the chicken. Divide the sweet potato mixture between 4 plates and top with the basil, cilantro, cashews, and miso dressing. Serve with lime wedges.