Preheat your smoker or pellet grill to 300℉.
In a large bowl, add ground beef, onion, cheese, eggs, garlic, ketchup, Worcestershire sauce, bread crumbs, milk, salt, Italian seasoning, black pepper, and paprika. Mix well to combine and let rest for 5 minutes.
Shape the meat into a loaf and position it in the center of a wire baking rack.
Place on the smoker and cook until the internal temperature reaches 165°F, approximately 2 hours.
In a small bowl, combine meatloaf sauce ingredients. Mix until well combined. 30 Minutes before the cooking time is up, brush the sauce on the meatloaf.
Remove from smoker, and let rest for 5-10 before serving.