Don't you hate it when a recipe calls for a tablespoon of tomato paste? After you open a can to use the little bit that you need, you still have tomato paste left in the can. It's so wasteful to throw it out and it won't last very long in the refrigerator. So what do you do?
First, put the unopened can of tomato paste in the freezer. After a few hours it will be completely frozen. Run the can under warm water for just a minute. Then, use a can opener to cut off the top and bottom of the can. The frozen tomato paste should slide right out. You can also use the back of a spoon to gently push it out. Then just slice the frozen tomato paste into 1/2 inch slices. You will have six slices which is equal to six tablespoons.
Then just put the frozen slices of tomato paste in a sealable plastic bag and store them in the freezer. The next time you need a tablespoon of tomato paste, just take one out and plop it in your recipe.
I tried another version of this pin which was similar because it also involves freezing the tomato paste. With this method, you spoon the leftover tomato paste into an ice cube tray and freeze it. This way doesn't work as well because the tomato paste gets freezer burn and looks really gross. It's also difficult to get the cubes out. So I definitely recommend the first method of freezing leftover tomato paste.
Inspired by this pin for storing leftover tomato paste.