I love to add sautéed veggies to these meatballs subs. You can use peppers and onions or even mushrooms to add some extra flavor. I also like to add some wilted arugula for a peppery bite as well. Pickled veggies like giardiniera or jalapeno are a great way to add a little zing as well! You could also serve these meatballs sandwiches with a u003ca href=u0022https://midwestfoodieblog.com/simple-beetroot-salad-with-feta/u0022u003ecrisp, fresh saladu003c/au003e in order to get more veggies in!