Butternut Squash Soup

WHAT YOU'LL NEED

• 1 tablespoon olive oil
• 1 onion peeled and diced
• 1 medium butternut squash peeled deseeded and cut into wedges
• 1 small potato peeled and quartered
• 2 garlic cloves peeled and crushed
• A pinch dried chilli flakes (optional)
• freshly ground black pepper
• 1 litre water
• 10 grams Knorr Vegetable Stock Cube
• A few parsley sprigs to serve
• 50 ml double cream to swirl