Rinse the tomatoes under cool water and pat dry. Use a sharp knife to core the tomatoes.
Spread the tomatoes in a single layer on a baking sheet, and freeze until solid.
Transfer the tomatoes to freezer containers and bags, and freeze until use.
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Notes
This can be done for any amount of tomatoes, as long as you keep them in a single layer on your baking sheet for the initial freeze. This may require you to do the freezing in batches.To peel your tomatoes, rinse the frozen tomatoes under water for about 10 seconds, and the peels should slip right off.Frozen tomatoes will be good for 8-12 months with most freezer containers or bags, though they will last for 2-3 years if vacuum sealed.