You can use leftover dried tomato oil in recipes like this vinaigrette - it works in any homemade salad dressing to give a hint of tomato flavor. You can also use it in place of regular olive oil in any recipe that could benefit from the lovely tomato flavor, like sautéed chicken, ground beef that will go into a pasta sauce, soups and stews, etc.. Basically, keep it by your other oils and use it when you would like a boost of tomato flavor!