Double Cheeseburger For A Crowd

Instructions

• Preheat the oven to 400°F (200°C).
• In a medium 8-inch (20-cm) cast-iron skillet, press down half of the ground beef with a spatula to mold into a patty. Season with salt and pepper.
• Place the cast-iron skillet over medium-high heat and sear the patty until browned, about 4 minutes on each side.
• Remove the patty from the skillet and set aside. Repeat with remaining beef.
• Return the pan to low heat and add the onion. Cook, stirring occasionally, until the onion is caramelized, about 20 minutes.
• Add the garlic and spinach, stirring until the spinach is cooked down, about 5 minutes.
• Lay one sheet of puff pastry on a baking sheet and top with 1 patty.
• Layer 4 slices of cheese over the patty, then top with the caramelized onion mixture.
• Top with the remaining 4 slices of cheese and the other patty.
• Cover with the other sheet of puff pastry.
• Trim the edges of the pastry with a knife and discard.
• Crimp the edges of the pastry, then press with a fork to seal.
• Brush the top and sides of the pastry with the beaten egg and sprinkle with sesame seeds.
• Bake for 30 minutes, or until the pastry is golden brown and cooked through.
• Slice and serve with additional toppings of your choice.
• Enjoy!