Pre heat oven to 375°F (190°C).
Place a single layer of potato on the bottom of the lined pan and brush with the cream and butter mixture
Carefully place another layer on top trying to ensure that each layer is neat, snug and of the same thickness. Brush again
Continue layering until you've used all of the potato
Cover the pan with another layer of parchment paper and place your second tin snuggly on top. Weigh down the top pan with baking beads or something similar
Place in the oven for around 50 minutes and then remove the top pan and parchment paper and cook for a further 10-15 minutes to allow the top to brown a little
Remove from the oven and leave uncovered to cool. When cold, place the second tray back on top and weigh down again to press the potato flat. If the beads don't seem heavy enough use 4 cans from your larder
Place in the fridge and leave overnight
The next day, remove from the fridge and tip out onto a chopping board. Remove the parchment paper and cut into the size. You could cut them into squares to present as a side or as i have done, cut them into chips (chunky fries)
Place your frying pan over a medium high heat and in small batches dry fry your pavé. Turn them frequently and carefully until they are hot and crisp and delicious. Sprinkle with a generous amount of salt