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Ingredients

2 tablespoons unsalted butter 1 tablespoon olive oil 3 large yellow onions, thinly sliced 1 teaspoon salt ½ teaspoon ground black pepper 1 pound ground beef 1 teaspoon garlic salt ¼ teaspoon black pepper 4 slices Swiss cheese 8 slices rye bread 8 teaspoons butter

Nutrition Info

677.1 calories carbohydrate: 43.4 g cholesterol: 133.8 mg fat: 41 g fiber: 5.7 g protein: 33.6 g saturatedFat: 20.1 g servingSize: - sodium: 1639.7 mg sugar: 7.6 g transFat: : - unsaturatedFat: : -

Heat butter and oil in a Dutch oven. Add onions, season with salt and pepper, cook, stirring continually, for 3 minutes. Cover with a lid and allow onions to caramelize, stirring occasionally to prevent burning, about 20 minutes.
Meanwhile, combine ground beef, garlic salt, and pepper in a bowl and mix thoroughly. Shape ground beef into 4 rectangular patties.
Cook patties in a skillet over medium-high heat, flipping once, 3 to 4 minutes per side. Add a slice of Swiss cheese to each patty and top each with an equal amount of caramelized onions.
Set an oven rack about 6 inches from the heat source and preheat the oven's broiler.
Spread 1 teaspoon butter over each slice of bread. Broil until lightly golden and toasted. Assemble patty melts and serve immediately.

4 patty melts

These patty melts are quick to put together, and are better than a diner because they're not nearly as greasy!