1Make Mustard and Maple Marinade: Place marinade ingredients in a medium bowl and whisk to combine. Add chicken and turn to coat. Set aside.
2Place sweet potato slices on a microwave-safe plate. Season with salt and pepper and pour over the stock. Cover plate with vented lid or cling film and place on turntable. Press MICROWAVE and set to 100% for 5 minutes. Press Start to begin cooking.
3Arrange chicken slices in a single layer over sweet potatoes and place tenderstem broccoli next to the chicken. Cover and place back on turntable. Press MICROWAVE and set to 100% for 4 minutes. Press Start to begin cooking.