Categories: Burgers

Ingredients

• 1 medium onion, thinly sliced
• Cooking spray
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1 lb. ground sirloin
• 2 tbsp. mayo
• 1 1/2 tbsp. crumbled blue cheese
• 8 slider buns, toasted
• 1 1/2 cups arugula
• 8 thin tomato slices

Directions

1. Heat a medium nonstick skillet over medium-high heat. Add onion to pan; coat onion with cooking spray. Cook 15 minutes, stirring frequently, until tender and browned. Remove pan from heat. Finely chop 1/4 cup onion and place in a medium bowl, reserving remaining onion in pan.

2. Add salt, pepper and beef to caramelized onion in bowl; mix well. Divide beef mixture into 8 equal portions, shaping each into a 1/4-inch-thick patty.

3. Heat a grill pan over medium-high heat. Place patties on grill pan. Grill 3 minutes on each side, until cooked to desired doneness.

4. Place mayo and blue cheese in a food processor; process until smooth. Spread blue cheese mixture evenly on bottom halves of buns. Place 1 patty on bottom half of each bun. Top patties evenly with arugula, tomato slices and remaining caramelized onion; cover with bun tops.

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