To properly store a half-used can of diced tomatoes, follow these steps:
Transfer the contents: If the can has a removable lid, use it to cover the remaining diced tomatoes. If the can does not have a lid or the lid is not suitable for storage, transfer the diced tomatoes to an airtight container. Glass or plastic containers with tight-fitting lids work well for this purpose.
Refrigerate promptly: Place the container with the diced tomatoes in the refrigerator as soon as possible. The cool temperature of the refrigerator helps slow down the spoilage process and keeps the tomatoes fresh for longer.
Label and date: If the diced tomatoes are not in their original can, be sure to label the container with the contents and date. This will help you keep track of when the tomatoes were opened and ensure you use them within a reasonable timeframe.
Use within a few days: Half-used canned diced tomatoes typically stay fresh for up to 3-5 days when properly refrigerated. It's best to use them within this time frame to maintain their quality and taste.
If you find that you cannot use the remaining diced tomatoes within the recommended timeframe, consider freezing them for longer-term storage. Transfer the tomatoes to a freezer-safe container or freezer bag, removing any excess air, and label it with the contents and date. Frozen diced tomatoes can be stored for several months and are convenient to use in sauces, soups, or stews.
Remember to always inspect the diced tomatoes for any signs of spoilage, such as mold, off odors, or unusual color, before using them. If they show any signs of spoilage, discard them to ensure food safety.