Burgers with French Onions

By ele1521

Ingredients

• 1/3 cup light mayonnaise
• 1/4 cup loosely packed fresh parsley leaves, finely chopped
• 1 small clove garlic, crushed with press
• Salt
• Pepper
• 2 teaspoons olive oil
• 1 medium (6- to 8-ounce) red onion, cut in half, thinly sliced
• 4 ounces mushrooms, sliced
• 1/2 cup water
• 1 teaspoon sugar
• 1 1/4 pounds 85-percent lean ground beef
• 1 ounce Gruyère cheese, shredded
• 4 brioche hamburger buns, toasted
• 4 leaves Boston lettuce

Details

Servings 4
Preparation time 15mins
Cooking time 25mins

Preparation

Step 1

Prepare outdoor grill for covered direct grilling on medium.

In small bowl, stir together mayonnaise, parsley, garlic, and 1/4 teaspoon freshly ground black pepper; set aside.

In 12-inch skillet, heat oil on medium-high. Add onion; cook 3 to 4 minutes or until beginning to soften, stirring occasionally. Add mushrooms, water, sugar, and 1/4 teaspoon salt; cover and cook 5 to 6 minutes or until mushrooms are tender, stirring occasionally.

Shape beef into four 3/4-inch-thick burgers. Lightly sprinkle with 1/4 teaspoon each salt and freshly ground black pepper to season both sides.

Grill burgers, covered, 7 minutes for medium or until desired doneness, turning over once. Top each burger with 1/4 cup onion mixture and 1 tablespoon cheese. Cover; cook 1 minute or until cheese has melted. Serve on buns with garlic mayonnaise and lettuce.