Feta Burgers With Grilled Red Onions - cooking recipe

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

Preparation

Break up beef in large bowl.
Sprinkle feta, oregano, salt, and pepper over (meat); toss.
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.
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.
Spray grill rack with nonstick spray.
Prepare barbecue (medium-high heat).
Brush onion with 1 tablespoon oil; sprinkle with salt and pepper.
Place burgers and onions on grill. Cover; cook 5 minutes.
Turn onions and burgers; cook until onions are charred in spots and burgers are medium-well, about 4 minutes longer.
Transfer to plate. Brush cut sides of buns with garlic oil and place buns, cut side down, on grill; toast about 1 minute.
Turn buns; cook until heated, about 1 minute.
Place burgers on bun bottoms and top each with onion, tomato, and bun top.