Mix the olive oil, balsamic vinegar, garlic, parsley (if using) and seasoning together in a large bowl.
Add the mushrooms, chicken and peppers and stir until the meat and veg are well coated. Cover the bowl and leave to marinate for at least 30 minues, stirring occasionally.
Preheat the barbecue or grill.
Thread onto 8 skewers, alternating the mushrooms, chickens and peppers. Cook on a sheet of foil on a medium-hot barbecue (or under the grill) for about 6-7 minutes on each side.
*All information included in this recipe has been provided by Monaghans Mushrooms.