Transfer to a roasting tin. Place the fillet in the centre of the roasting tin, arrange the whole garlic bulbs around the fillet and drizzle with a little oil. Roast for 23 minutes for medium-rare ...
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.