A pie using seasonal ingredients of Winter. Per recipe notes by Emily Elsen & Melissa Elsen: "Meyer lemons are a particularly delicious and easy to find variety of lemon available during the dead of winter, when you really need to eat something life affirming. The richness of the dark chocolate layer on the bottom goes particularly well with the peppery, warm citrus flavor Meyer lemons offer. If you don't have Meyer lemons, you can use regular lemons, but the flavor won't be exactly the same." And per the side note: "If you have access to fresh mandarin oranges, this recipe is also excellent made with their juice. Reverse the lemon and orange quantities and reduce the sugar to taste, or by about ⅓ cup.