Potato and Mushroom Terrine with Mushroom a la Grecque

• 5kg Large Nicola potatoes
• 1kg Mushroom duxelle
• 30

Wash the potatoes under cold running water, place in a steamer and cook until the potatoes are tender. Remove from the steamer and allow to cool slightly before peeling. Slice the potatoes into 1cm thick slices. Place the mushroom duxelle into a bowl and add the truffle oil, parsley and thyme. Mix