Thread beef and capsicums onto skewers. In a bowl whisk marinade ingredients together. Brush marinade over skewers, then place on a lined baking tray and leave to marinate in the fridge for at least 30 minutes. Reserve marinade for basting.
Whisk salad dressing in a small jug until well combined. Place all prepared salad ingredients in a serving bowl and toss with salad dressing.