For quickness I microwaved the potato until it was just cooked. 3-4 mins. I tested it with a cocktail stick. If you have time, bake at 160 until just cooked. Leave to cool a bit. Preheat oven to 200. Slice the top off the potato and scoop out the inside with a spoon. Set a side

Wrap up the potato with bacon as shown. Add Parmesan to the potato and mix

Now add potato inside the potato 😁 create a little hole in the middle and squish down (so it doesn't come out when it's upside down!). Bake for about 20 mins upside down then turn over. Bake for another 5. Remove from oven again then add the egg yolk. Pop back in the oven and bake until egg is cooked to your liking. Runny like the pic was 5-6 mins 😀