Bacon, Onion & Mushroom Empanada - Easy Bacon, Cheese & Mushroom Puff Pastry Pie Recipe Learn how to make a delicious empanada made with puff pastry and filled with bacon, onion, mushroom, egg and cheese. This is an easy appetizer that everyone will enjoy! ▼ INGREDIENTS LIST: - 1 puff pastry sheet - 1 medium onion, chopped - 5 bacon slices