For a vegetarian version, simply omit the bacon and add some finely chopped sautéed mushrooms for a different flavor twist. If you want to make these potato balls gluten-free, you can use gluten-free breadcrumbs. Also, consider adding different herbs like dill or parsley instead of chives, or try using different types of cheese. For an extra crunchy exterior, try double-coating the balls in breadcrumbs before baking.
