Step 1

Preheat the oven to 350°F/180°C. Butter a large baking pan. Place a sheet of phyllo on a clean work surface near the baking pan. Sprinkle lightly with feta. Scrunch the phyllo together across the wide side so that it bunches up and resembles a pleated surface. Lift this carefully and place it along the short side of the baking pan. Repeat with the remaining phyllo and cheese, placing each scrunched piece of feta-sprinkled phyllo snugly next to the previous one until the pan’s surface is covered.

Step 2

Using a whisk, beat the eggs in a medium size bowl, then slowly add the melted butter, whisking fast. Pour the seltzer over the surface of the phyllo, then pour the egg-butter mixture on top, and finally sprinkle with kefalotyri. Bake until golden brown, about 45 to 50 minutes. Remove, cool slightly, and cut into pieces. The pie will look pleated.