Preheat your oven to 350°F (175°C) and grease an 8×8-inch baking dish.

In a large bowl, whisk together eggs and olive oil until well combined.

Fold in chopped spinach and crumbled feta until evenly mixed.

In a separate bowl, combine flour, salt, and pepper. Gradually mix the dry ingredients into the wet mixture until just combined.

Pour the batter into the prepared dish and spread evenly.

Bake for 25–30 minutes, or until golden brown and a toothpick inserted comes out clean.

Allow to cool before slicing into squares.