How to Make It
Process halloumi, parsley, and thyme in a food processor until very finely ground. Transfer mixture to a large bowl. Add beef and egg; mix with hands just until combined. Shape mixture into 24 (1-inch) meatballs. Preheat broiler with oven rack 6 inches from heat. Place meatballs in a single layer on a baking sheet; broil until cooked through, 9 to 10 minutes. Serve with marinara.