I boil either sweet spuds or any type & mix with Mia's milk then put through the siv or use blender if I am in a rush. Adding a nip of cinaman (sp!) powder to flavour! Good luck I weaned Mia with the help of a dietician at the hosp cos she was so underweight & I hated doing it but I am so glad now she is on 3 spoonfeeds a day. If you want any advice feel free to pm me.
I steam thin slices of peeled potatoes and add some water to it and put it in the blender! Josh loves them