Tart with cheese and spinach

Ingredients

• 1 onion, finely chopped
• 500 g spinach, frozen
• ½ teacup Pdo Sitia Extra Virgin Olive Oil "Golden Creta Savouidakis"
• 1 puff pastry sheet
• 1 egg
• ¾ teacups fresh milk
• 400 g various yellow cheeses, grated 
• 1 small light sour cream
• Salt
• Pepper

Execution

• In a non-stick pan, heat the Pdo Sitia Extra Virgin Olive Oil "Golden Creta Savouidakis" over medium heat and sauté the onion (2-3 mins).
• Add the spinach and sauté until all liquids have been absorbed.
• Remove from the heat and wait for it to cool off.
• Meanwhile, butter a tart pan and spread the puff pastry sheet.
• If there is excess pastry over the tart pan, cut it with a pointy knife.
• Pierce the puff pastry with a fork and put it aside.
• In a bowl, beat the egg, milk, salt and pepper.
• Add the grated cheeses, the mix with the spinach and sour cream and blend everything well together.
• Place the filling on the puff pastry and spread it evenly.
• Fold and twist any excess part of the puff pastry sheet around the filling.
• Cook in a preheated oven at 180°C (convection function) for 40-45 mins until the tart surface turns golden brown and the puff pastry is well cooked.