Andouille and Beef Burgers with Spicy Mayo and Caramelized Onions

By MooK

Ingredients

• Spicy mayonnaise
• 3/4 cup mayonnaise
• 1 tablespoon fresh lemon juice
• 1 teaspoon Cajun or Creole seasoning blend
• 1/4 teaspoon hot pepper sauce
• Burgers
• 1/2 pound andouille sausage, cut into scant 1/4-inch cubes
• 3/4 cup pecans, toasted, chopped
• 1 teaspoon salt
• 1/4 teaspoon ground black pepper
• 1 1/2 pounds ground beef chuck or ground beef (20 percent fat)
• .
• Caramelized onions
• 1 1/2 pounds onions, thinly sliced
• 2 tablespoons olive oil plus more for brushing grill rack
• 3 garlic cloves, minced
• 1 tablespoon golden brown sugar
• 6 large hamburger buns, split
• 8 ounces crumbled blue cheese

Preparation

Step 1

For mayonnaise:
Mix all ingredients in small bowl. Cover and chill.

Do ahead: Can be made 2 days ahead. Keep chilled.

For burgers:
Toss first 4 ingredients in large bowl. Add beef; blend gently. Shape mixture into six 1/2-inch-thick patties. Transfer patties to small baking sheet.

Do ahead: Can be made 1 day ahead. Cover and chill.

For onions:
Prepare barbecue (medium-high heat). Toss onions and next 3 ingredients in large skillet. Place skillet on grill; cook until onions are golden, stirring often, about 25 minutes. Remove from grill; season with salt and pepper.

Brush grill rack with olive oil. Grill buns, cut side down, until golden, about 2 minutes. Transfer buns to work surface. Grill burgers until brown on bottom, about 3 minutes. Turn over; sprinkle with cheese. Grill until burgers are cooked to desired doneness, about 3 minutes for medium. Place some onions, then burger, on each bun bottom. Spread mayonnaise on cut side of bun tops; place on burgers. Serve with remaining mayonnaise.