If your recipe requires seeded tomatoes, cut the fruit in half horizontally and gently squeeze out the seeds and the juice. However, we encourage you to think about the recipe and consider whether the tomato could be incorporated with seeds intact. There are simply too many valuable nutrients in the seeds that you would not want to lose unnecessarily. When cooking tomatoes, we recommend avoidance of aluminum cookware since the high acid content of the tomatoes may interact with the metal in the cookware. As a result, there may be migration of aluminum into the food, which may not only impart an unpleasant taste, but more importantly, may have a potentially unwanted impact on your health.