1. Break up beef in large bowl. 2. Sprinkle feta, oregano, salt, and pepper over (meat); toss. 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. 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. Spray grill rack with nonstick spray. 6. Prepare barbecue (medium-high heat). 7. Brush onion with 1 tablespoon oil; sprinkle with salt and pepper. 8. Place burgers and onions on grill. Cover; cook 5 minutes. 9. Turn onions and burgers; cook until onions are charred in spots and burgers are medium-well, about 4 minutes longer. 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. Turn buns; cook until heated, about 1 minute. 12. Place burgers on bun bottoms and top each with onion, tomato, and bun top. ---------------------------------------------------------------------------
Nutrition
Ingredients
