In a bowl, whisk together the egg yolk, 40g of the parmesan and some black pepper. Add in the reserved pasta water to complete your sauce

Cut your bacon into small pieces, add back into your pan along with your sauce and your cooked pasta and mix to combine. The heat from the pasta will gently cook the eggs in the sauce - you don't want too high a heat or you'll end up with scrambled eggs

Plate up and sprinkle your remaining Parmesan on top - enjoy!