Sirloin Burgers With Blue Cheese Mayo and Sherry Vidalia Onions

Flavorful burgers for the grilling season....

• Ready In: 35 mins
• Serves: 4
• Yields: 4 burgers

Ingredients

• 1  lb  ground sirloin
• 1⁄2 cup  crumbled blue cheese
• 1⁄4 cup  canola mayonnaise
• 2  teaspoons  chopped fresh thyme, divided
• 1⁄4 teaspoon  hot pepper sauce
• 1  teaspoon black pepper, divided
• 1⁄8 teaspoon kosher salt
• 1⁄2 teaspoon  extra-virgin olive oil
• 4  slices  vidalia onions (1/4 inch thick)
• 2  teaspoons sherry wine vinegar
• 2  cups  loosely packed arugula
• 4 (1 1/2ounce)  whole wheat hamburger buns, toasted
•  cooking spray (for grilling)

Directions

1. Preheat grill to medium high heat.
2. Combine blue cheese, mayonnaise, 1 teaspoon thyme, and hot pepper sauce in a small bowl, and stir well.
3. Divide beef into 4 patties, shaping each into a 1/2 inch patty.
4. Sprinkle beef evenly with 1/2 teaspoon salt, and pepper.
5. Brush oil evenly over both sides of onion slices, and sprinkle with remaining 1/2 teaspoon pepper.
6. Place patties and onions on grill rack coated with cooking spray, cover and grill for 3 minutes on each side.
7. Set patties aside, and keep warm.
8. Place onion slices in a zip-top plastic bag and seal.
9. Let stand 5 minutes, and toss with remaining 1 teaspoon thyme, and vinegar.
10. Spread cut sides of buns evenly with mayonnaise mixture.
11. Arrange 1/2 cup argula on bottom half of each bun, and top with a patty, 1 onion slice, and bun top.