Ingredients

  • 1/2 cup salted roasted pistachios
  • 3/4 cup coarsely chopped onion, plus 4 onion slices (1/4 in. thick)
  • 1 large egg white, whisked to blend
  • 1/2 pound ground lamb
  • 1/2 pound ground beef
  • 1 tablespoon baharat* (Arabic spice blend)
  • 2 teaspoons black pepper
  • 4 to 5 tsp. Aleppo pepper*, divided
  • 1 1/4 teaspoons kosher salt
  • 3 cups cherry or pear tomatoes (any color)
  • 1/4 cup mayonnaise
  • 1 1/2 teaspoons lemon juice
  • 2 teaspoons olive oil
  • 4 hamburger buns, split
  • Butter lettuce leaves

Method

  • Soak 8 bamboo skewers (8 in.) in water for half an hour.
  • Heat a grill to medium (350° to 450°). Coarsely grind pistachios in a food processor, then pour into a bowl. Whirl chopped onion in processor until smooth and add to nuts along with egg white, meat, baharat, black pepper, 2 1/2 tsp. Aleppo pepper, and the salt. Mix with your hands. Shape into 4 patties, 1/2 in. thick.
  • Thread tomatoes lengthwise onto skewers. Combine mayonnaise, 1 to 2 tsp. Aleppo pepper, and the lemon juice and set aside. Brush onion slices with oil.
  • Grill burgers, tomatoes, and onion slices, turning once, until burgers are cooked through (6 to 8 minutes total), and vegetables are charred (3 to 5 minutes). Transfer to a platter as done. Grill buns cut side down until golden, 1 to 2 minutes.
  • Spread buns with mayo. Toss onions with a little Aleppo pepper. Build burgers with lettuce, onions, and some tomatoes from skewers; serve the rest on the side.
  • *Find in the spice aisle or at worldspice.com