<p></p><p><ol></ol></p><p>Cook the spinach over low heat with a drizzle of olive oil until thawed and it has released its water. Season with salt and pepper, then let cool.</p><p><ol></ol></p><p>Add the beaten eggs and crumbled feta to the spinach. Mix well and adjust the seasoning. Melt the butter.</p><p>Cut the filo pastry sheets in half, then brush them with melted butter. Place half of the sheets in a gastro pan, add the spinach filling, and cover with the remaining sheets.</p><p>Cut into rectangles, and place in the oven.</p>