???I???m a fan of starting with a root vegetable such as carrot or sweet potato, because they???re naturally sweet and puree to a smooth texture,??? says Annabel Karmel, author of more than 20 books about feeding your children and creator of the app Annabel???s Essential Guide to Feeding Your Baby & Toddler. ???No-cook purees such as mashed banana or avocado are also fantastic and packed full of n