Slow cooker chicken, porcini & barley soup

Ingredients

• 20 gram dried porcini mushrooms
• 1 cup (250ml) boiling water
• 2 chicken marylands (700g)
• 1 brown onion (150g), chopped finely
• 2 clove garlic, crushed
• 1 litre (4 cups) chicken stock
• 1/2 cup (100g) pearl barley
• 1 sprig fresh rosemary
• 1 sprig fresh thyme
• 1 parsnip (250g), chopped finely
• 1 kumara (250g), chopped finely
• 2 stalks celery (300g), trimmed, chopped finely
• 250 gram swiss brown mushrooms, quartered
• salt and pepper, to taste
• 1/2 cup finely chopped fresh flat-leaf parsley