Leave to cool and turn the oven off for now. Squeeze the soft roasted garlic from the cloves and set aside. Tip both of the flours into the bowl of a freestanding mixer fitted with a dough hook ...
Mash the potatoes with 1 1/4 cups of the broth, 2 or 3 cloves of roasted garlic* and chives, if desired. Add additional broth, if needed, until desired consistency is reached.