You can freeze whole tomatoes to enjoy later in the year if you cut them with the stem.
Here is what you do:
Cut about 3/8 of an inch off the stem end of a ripe tomato with no blemishes. Put the stem-on tomatoes into a freezer bag and then put the freezer bag into a brown grocery bag.
To use, hold the frozen tomatoes under hot water for a few seconds. The skin will split, allowing you to slip it off and easily cook your tomatoes.
