Plum tomato, also known as a processing tomato or paste tomato, is a type of tomato bred for sauce and packing purposes. They are generally oval or cylindrical in shape, with significantly fewer locules than standard round tomatoes and a generally higher solid content, making them more suitable for processing. Plum tomatoes are also sometimes favored by cooks for use during the tomato off-season, as they are generally considered more amenable to handling and are therefore available in a state closer to ripe than other supermarket tomatoes.
Tomatoes are also an excellent Source: of vitamin A, which is an essential component for normal vision and immune function. They are also a very good Source: of vitamin K, which assists in blood clotting and potassium, which can help to reduce blood pressure. Lastly, they are a good Source: of manganese, a component of antioxidant enzymes.
Refrigerate any unconsumed fully ripe tomatoes, but allow them to come to room temperature before serving them. (To speed up this process, slice them while still cold—slices will warm up much more quickly than an intact fruit.) One study we've read suggests that refrigerating for no longer than three days is optimal.*
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