Peel the potatoes and vegetables and cut them into smaller pieces.
Put potatoes and vegetables in a saucepan and pour water over until just covered.
Cook for 12-15 minutes under a lid.
Poke the potatoes and vegetables to check if they are tender.
Pour the water from and down into a small bowl. It may be used later.
Mash potatoes / vegetables with a fork or mashed potatoes.
Add the fat and whisk in the mash with a whisk.
Add infant formula and whip it into the bog.
Add a little of the saved potato water if the bog is too thick. Or pour in a little more milk.
Serve the warm mash. Check that it has the correct eating temperature before giving it to the child. If it has become too cold, you can possibly. heat it a little.
If it is too hot, you can whip it until it has cooled down sufficiently.
You can scrape the mash through a sieve if you want a creamy mash without lumps.