Peel your potatoes and garlic.
Place in the pressure cooker and cover with water.
Pressure cook for 12 minutes.
Release the steam (either manually or naturally).
Use a fork to check and see if they are tender.
Drain the water (But leave any soupy looking liquid. This is good for the mash).
Keeping the potatoes in the magic pot, use a potato masher, a potato ricer or the back of a wooden spoon to mash the potatoes.
This is where you can choose what to add to your potatoes.
Serve.
Any leftovers you can freeze for another day.