Patty Melt Sandwich - Food Gardening Network

Ingredients

• 2 tablespoons olive oil Butter, for the pan (optional)
• 1 red onion, sliced
• 1 pound ground beef
• 1 1/2 teaspoons kosher salt
• 1/2 teaspoon freshly ground black pepper
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon smoked paprika
• 2 teaspoons Worcestershire sauce
• 8 slices marbled rye bread
• 4 tablespoons (1/2 stick) unsalted butter, softened
• 8 slices Swiss cheese
• 8 slices American cheese