For those following a gluten-free diet, you can still enjoy a delicious meatball sub by making a few simple substitutions. Instead of using regular breadcrumbs, opt for gluten-free breadcrumbs or crushed gluten-free crackers. You can also use gluten-free bread or rolls for the sub. The meatballs can be made with a combination of ground beef or turkey, gluten-free breadcrumbs, Parmesan cheese (if tolerated), garlic, and Italian seasoning. To assemble the sub, use the gluten-free bread or rolls, layer with your choice of cheese, add the meatballs and sauce, and top with more cheese. Bake in the oven until the cheese is melted and bubbly. This gluten-free meatball sub is a tasty option for those with dietary restrictions!