How do we start baby first feed?

Yes purees was what my baby's PD recommended as a start. Fruits or veggies. But use only 1 ingredient every time to see if your baby is allergic to it or not. Feed the same for roughly 3-4 days. I started with ladyfingers banana puree which is less sweeter than the other range. My baby hates avocado till today 7 mths old no matter how I mixed with other fruits 😅