Spicy parsnip soup

INGREDIENTS

• olive oil
• 1 knob butter
• 1 large onion, peeled and roughly chopped
• 2 cloves garlic, peeled and roughly chopped
• 1 thumb-sized piece fresh ginger, peeled and roughly chopped
• 1 tablespoon garam masala
• 6 parsnips, peeled and chopped into chunks
• 500 ml semi-skimmed milk
• 1 litre organic vegetable stock
• sea salt
• freshly ground black pepper
• 1 fresh red chilli, deseeded and finely sliced
• 1 handful fresh coriander leaves, optional
• crusty bread, to serve