For the lamb meatballs: In a large bowl, combine the ground lamb, fresh mint, spice rub salt, and red onion. Mix together with your hands until thoroughly mixed and slightly sticky. Form mixture into 12 balls, approximately two inches wide.

Adjust top oven rack to six inches below the broiler. Preheat broiler to high. Add oil to rimmed baking sheet. Add the meatballs, and roll them around until they are coated in the oil. Arrange in two rows in such a way that they will cook evenly under the broiler element. Transfer pan to the broiler, and cook until meatballs are browned on the top, 4 to 5 minutes. Carefully remove the pan, and use a pair of tongs to flip the meatballs. Return pan to the oven, and cook until browned on the other side, another 4 to 5 minutes. Remove and set pan aside.

For the yogurt and pomegranate sauce: In a medium bowl, whisk together all ingredients. Season to taste with salt and pepper.