Don't worry - there's no reason to throw it away! There are several ways you can use the leftover tomato confit oil: - In place of regular cooking oil, to add flavor to dishes. - Serve with fresh bread and antipasti - as a dipping oil. - Spooned over dips and sauces. - To massage kale. Just make sure to keep the confit tomatoes stored in the refrigerator at all times due to the risk of botulism or freeze it in ice-cube trays (as mentioned above).