Preheat your oven to 400˚F (200˚C) and grease a 15-inch round pan with a mix of unsalted butter and olive oil.

In a mixing bowl, combine flour and salt, then add one egg and milk, mixing to form a smooth batter.

Pour two-thirds of the batter into the hot greased pan, spreading it evenly across the bottom.

Sprinkle the crumbled feta over the batter layer, ensuring it's evenly distributed.

Mix the reserved egg with a splash of water and incorporate it into the remaining batter, then pour this over the feta layer.

Dot the top with small pieces of butter and drizzle with olive oil.

Bake for about 40 minutes, rotating halfway, until golden brown and edges pull away from the pan.

Let cool slightly, then slice and serve warm or at room temperature.