Feta Burgers With Grilled Red Onions

Ingredients

• 3 lbs lean ground beef
• 1 cup feta cheese, packed, crumbled
• 2 teaspoons dried oregano
• 1 1/2 teaspoons salt
• 1 1/2 teaspoons ground black pepper
• 8 large garlic cloves, peeled
• 1/2 cup extra-virgin olive oil
• 1 teaspoon extra-virgin olive oil
• nonstick vegetable oil cooking spray
• 2 medium red onions, peeled, each cut crosswise into 4 slices
• 8 hamburger buns
• 2 large tomatoes, each cut crosswise into 4 slices

Directions

1. 1

   Break up beef in large bowl.

2. 2

   Sprinkle feta, oregano, salt, and pepper over (meat); toss.

3. 3

   Divide into 8 portions; form each into 4 1/2-inch burgers, pressing in center to form slight indentation. *DO AHEAD Can be made 1 day ahead. Cover; chill.

4. 4

   Puree garlic in processor; With machine running, gradually add 1/2 cup oil; process 30 seconds. *DO AHEAD Can be made 1 day ahead. Cover; chill.

5. 5

   Spray grill rack with nonstick spray.

6. 6

   Prepare barbecue (medium-high heat).

7. 7

   Brush onion with 1 tablespoon oil; sprinkle with salt and pepper.

8. 8

   Place burgers and onions on grill. Cover; cook 5 minutes.

9. 9

   Turn onions and burgers; cook until onions are charred in spots and burgers are medium-well, about 4 minutes longer.

10. 10

    Transfer to plate. Brush cut sides of buns with garlic oil and place buns, cut side down, on grill; toast about 1 minute.

11. 11

    Turn buns; cook until heated, about 1 minute.

12. 12

    Place burgers on bun bottoms and top each with onion, tomato, and bun top.