You can freeze extra tomatoes for use in winter. Frozen tomatoes are best used in cooked dishes as freezing will cause them to lose their firmness.
Here are two ways to freeze tomatoes:
● Place whole or peeled tomatoes in a plastic freezer bag and freeze. (To peel a tomato, place it in a strainer and pour boiling water over it for 5 seconds. The peel will pull away easily. You can also place a tomato in boiling water for 45 seconds, then plunge it in ice water for several seconds before peeling.) When ready to use, allow frozen tomatoes to come to room temperature.
● Tomato purée can also be frozen. Cook or steam tomatoes in a little water until soft. Mash the fruit through a press or wire strainer or whirl in a blender; add sugar and or lemon juice to taste; heat to boiling; chill and pack.