Ingredient:

• 1 ¼ pounds ground lamb
• 1 egg
• 1 teaspoon dried oregano
• 1 teaspoon dry sherry
• 1 teaspoon white wine vinegar
• ½ teaspoon crushed red pepper flakes
• 4 cloves garlic, minced
• ½ cup chopped green onions
• 1 tablespoon chopped fresh mint, or to taste
• 2 tablespoons chopped fresh cilantro
• 2 tablespoons dry bread crumbs
• ⅛ teaspoon salt
• ¼ teaspoon ground black pepper
• 5 hamburger buns