Place the pancetta slices one next to the other in an oven dish or on a baking tray lined with baking paper. The baking paper is not a must but it helps to clean up after.
Place the pancetta in a preheated oven at 180C for 10-15min or until throughly golden. Let it cool down and chop.
Mix everything together throughly and place in an oven-safe dish. Try to have the potatoes only one layer high throughout.
Cook in a preheated oven at 180C / 350F for 30-45min or until they offer no resistance when you put a think knife through them. Mix carefully every 10min.
Return it to the oven this time at 230C / 450F for 5-10min or until nicely golden.