Heat 2 tablespoons of olive oil in a skillet over medium heat. Add one finely chopped onion and two minced garlic cloves, cooking for 3-4 minutes until the onion becomes translucent and fragrant.

In a large mixing bowl, combine the sautéed onion and garlic with 2 cups of finely chopped fresh spinach and 1 cup of crumbled feta cheese. Crack in two eggs to bind everything together and season with salt and pepper to taste.

Preheat your oven to 375°F (190°C). Prepare your baking dish by lining it with parchment paper or greasing it lightly with olive oil.

Roll out one sheet of thawed puff pastry on a lightly floured surface. Carefully place the pastry into the prepared baking dish, pressing it evenly into the corners and along the sides.

Spoon the creamy spinach and feta mixture into the pastry-lined baking dish, spreading it out evenly.

Place the baking dish in the preheated oven and bake for 25-30 minutes until the pastry is puffed and golden brown.

Once baked, let your Irresistible Spinach Feta Bake Squares cool for about 5 minutes before slicing.