- 2 tbsp cold-pressed rapeseed oil
- 1 medium onion , halved and sliced
- 2 garlic cloves , finely sliced
- 2 celery sticks , trimmed and thinly sliced
- 2medium carrots , cut into chunks
- 2 medium parsnips , cut into chunks
- 1 tbsp finely chopped thyme leaves
- 100g wholegrain rice
- 2medium leeks , sliced
- ½ small pack parsley , to garnish