In a large bowl, combine lamb, egg, breadcrumbs, grated onion, garlic, herbs, salt, and spices. Mix gently until just combined.
1 lb ground lamb, 1 large egg, ½ cup panko breadcrumbs, ½ large onion, 2 garlic cloves, 2 tablespoon fresh parsley, 2 tablespoon fresh dill, 1 tablespoon fresh mint, 1 teaspoon kosher salt, 1 teaspoon paprika, ¼ teaspoon freshly ground black pepper, 1 teaspoon ground cumin