Caramelized Onion Cheeseburgers

By Susie Middleton

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onion burger

Burgers just got better with the addition of tender sweet onions, melted cheese, and tangy lemon-Dijon mayonnaise.

Serves 4

Ingredients

2 Tbs. extra-virgin olive oil; more as needed.
1 large sweet onion, thinly sliced (about 2 cups)
Kosher salt and freshly ground black pepper
1/3 cup mayonnaise
1 Tbs. Dijon mustard
1-1/2 tsp. fresh lemon juice
1 tsp. finely chopped fresh rosemary
1 small clove garlic, minced
1-1/2 lb. 85%-lean ground beef
4 slices Comté or Gruyère cheese
4 good-quality hamburger buns or rolls, split.
12 fresh arugula leaves.

Directions

Prepare a medium-high gas or charcoal grill fire. Alternatively, position an oven rack 5 to 6 inches from the broiler and heat the broiler to high. Line the bottom of a broiler pan with foil and lightly oil the perforated part of the pan.

Meanwhile, heat the oil in a 10-inch skillet over medium-high heat. Add the onion, 1/4 tsp. salt, and 1/8 tsp. pepper; reduce the heat to medium low and cook, stirring occasionally, until deeply golden brown and tender, 15 to 18 minutes.

Combine the mayonnaise, Dijon, lemon juice, rosemary, and garlic in a small bowl. Season to taste with salt and pepper and set aside.

In a medium bowl, gently combine the beef with 1/4 tsp. salt and 1/8 tsp. pepper. Form the beef into 4 patties (3-1/2 inches in diameter) and make a deep depression in the center of each patty so the burgers keep their shape during cooking. Lightly sprinkle the patties with 3/4 tsp. salt and 1/2 tsp. pepper. Grill or broil them on the prepared pan for about 4 minutes per side for medium, or until desired doneness. Top each burger with 1 slice of the cheese and grill or broil until melted, 30 to 60 seconds.

Toast the buns on the grill or under the broiler until golden, 30 to 60 seconds. Serve the burgers on the toasted buns with the caramelized onions, mayonnaise, and arugula.

Serving suggestions

Grilled veggies are the perfect side. Try a simple Grilled Eggplant.

Nutrition information (per serving):

Calories (kcal): 740; Fat (g): 50; Fat Calories (kcal): 450; Saturated Fat (g): 16; Protein (g): 43; Monounsaturated Fat (g): 20; Carbohydrates (g): 27; Polyunsaturated Fat (g): 10; Sodium (mg): 930; Cholesterol (mg): 140; Fiber (g): 2;

Susie Middleton is editor at large for Fine Cooking magazine.


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