Preheat your oven to 400°F (200°C). In a food processor, combine gluten-free flour or all-purpose flour, salt, and sugar. Add the cold, cubed unsalted butter, pulsing until the mixture resembles coarse crumbs. Drizzle in the vinegar and gradually add ice water until the dough comes together. Chill the mixture in the refrigerator for 15 minutes to keep it nice and firm.

Roll out the chilled dough on a floured surface to fit your pie dish. Prick the bottom with a fork to prevent bubbling, then line it with parchment paper and fill with pie weights or dried beans. Par-bake the crust in the preheated oven for 10 minutes, until just set but not browned. Once finished, remove it from the oven, brush with an egg wash, and let it cool completely.

Lower the oven temperature to 350°F (175°C). In a large mixing bowl, whisk together the room temperature eggs and honey until the mixture is fluffy and well combined. Stir in the ground cinnamon, cornstarch, salt, fresh lemon juice, and vanilla extract. Mix until smooth, then gently fold in the ricotta cheese or Myzithra until you achieve a creamy consistency.

Pour the luscious filling into the cooled crust, spreading it evenly. Bake the Melopita Greek Honey Pie in the oven for 25 to 35 minutes, checking for doneness. The filling should be just set in the center with a slight jiggle, ensuring a custard-like texture. Keep an eye on it towards the end to prevent over-baking.

Once baked, remove the pie from the oven and let it cool on a wire rack for 1 to 2 hours. This cooling stage helps develop the flavors. For cleaner slices, refrigerate the pie until chilled. Before serving, elevate its charm by garnishing with extra honey and a sprinkle of cinnamon or honeycomb for a touch of Mediterranean elegance.