This quantity will fill about 7 big potatoes (14 halves).
Do not overcook the potatoes or they will be too soft to handle.
Do not scoop out to much mash or the potato will be too fragile to be stuffed.
Use preferably large potatoes, since they are easier to fill.
The initial bake of the potatoes in the oven makes for a dryer mash, that is firmer and easier to pipe on top of the stuffed potato halves.
To make sure the mash is smooth and free of lumps, push it through a sieve or potato masher
Add finely dices carrots if desired to the filling.