Melt-in-your-mouth Mazurian potato marjoram pie

My perpetually young-at-heart great auntie Krysia was my grandma Halinka’s younger sister, who lived in Olsztyn, not too far from the magical, meandering lake district called Mazury. She’s been making this potato pie for years, therefore the quantities and instructions she gave to me were ‘lots of marjoram, lots, lots’ and ‘a good amount of bacon, but not too much’. Here, I give you my interpretation of this delicious, family recipe.