This 30 minute Red Pickled Onions recipe comes with 5 optional add-ins to jazz up your pickling onions.Perfect for tacos, soups, salads, and burgers, these Mexican pickled onions are a great topping that adds lots of flavor to any dish.Special Tip: This is a vegan recipe thanks to the zero-calorie sweetener, or maple syrup. But if you prefer to use honey, that will work as well.