Peel, quarter and remove the core from the pear. Place in a steamer basket along with the Broccolini. Place over a pan of boiling water and steam until each item is tender. The potato will take longer (depending on the size you have cut it) so transfer the pear and Broccolini to a bowl when they are cooked.
Depending on your baby's age, you can either blend or mash the sweet potato, Broccolini and pear as smooth or coarse as you wish.
The puree is now ready to serve once it is cooled slightly or frozen in individual portions.