A healthy alternative to breadcrumbs for meatballs is rolled oats. Finely ground or quick-cooking oats work well as a binder, providing structure and helping the meatballs hold together. Rolled oats are a whole-grain option that adds extra fiber to your meatballs, making them a more nutritious choice compared to traditional breadcrumbs. Additionally, rolled oats are suitable for those following a gluten-free diet, as long as you choose certified gluten-free oats to avoid any cross-contamination.