To keep canned tomato paste fresh, it is important to store it properly. Here are some tips:

1. Store the can of tomato paste in a cool, dry place, away from direct sunlight.

2) Once opened, transfer any unused tomato paste to an airtight container and store it in the refrigerator. 3) Use a clean utensil, such as a spoon or spatula, to remove the tomato paste from the can to prevent contamination. 4) Cover the remaining tomato paste in the can with plastic wrap or a tight-fitting lid, and store it in the refrigerator. Use within 3-5 days. 5) If you only use a small amount of tomato paste at a time, consider freezing it in an ice cube tray. Once frozen, transfer the cubes to a freezer-safe container and store in the freezer for up to 3 months. By following these storage tips, you can keep your canned tomato paste fresh for longer and avoid waste.