Wash the onion, remove the peel and chop into pieces; Wash the broccoli, remove the bud, blanch it in hot water and chop into pieces.
Add broccoli, onions and stock into a cooking pot, let it simmer for 3 to 5 minutes, then let it cool off.
Once cooled off, add all the ingredients into a food processor and blend it into puree before serving.
Notes
Onions are high in vitamins, polyphenols, antioxidant, and anti-inflammatory, if the baby has asthma, you can also eat it to help alleviate symptoms, also help increase the secretion of digestive juices and promotes your baby's absorption of iron.