Place an oven rack in the second-highest position and heat broiler.Combine the lamb, raisins, cinnamon, 1 1/2 teaspoons salt, 1/4 teaspoon pepper, the bread crumbs, egg, and three-quarters of the scallions in a large bowl.Shape the mixture into golf ball–size meatballs and place on a foil-lined baking sheet.Broil, turning once, until cooked through, 6 to 8 minutes total.Divide the flat bread among individual plates and top with the meatballs, yogurt, mint, and the remaining scallions.
Really loved the use of raisins and cinnamon in this meatball recipe! I didn't make the gyros, but instead served with roasted squash and apples and riced cauliflower. Cooked a bit longer than recipe stated. Interesting and delicious!