Mix Philadelphia cream cheese, feta cheese, mozzarella, minced garlic, and parsley together
Roll out puff pastry and spread the cheese mixture evenly
Prepare the topping by combining Greek yogurt, red onion, garlic, parsley, herbs of Provence, chili flakes, salt, and black pepper
Spread the topping over the cheese mixture
Brush with beaten egg for a golden finish
Bake until golden brown and crispy
