I've seen and read online, and experienced firsthand, that refrigerating a tomato is an awful idea. Not only does it lose freshness, it does little to prevent wilting and leads to flavorless tomato.
But, eventually a tomato needs to be cut if it's going to be used in slices (for say, a sandwich), and I hate to throw it out when there's still a full half of the fruit left.
How can I preserve the tomato after it has been cut, without putting it in a refrigerator and spoiling the freshness?
Best Answer
Doing a bit of Googling, it seems that there are a couple of different methods but I think the one that will please you best is to:
Some recommend putting it in the fridge regardless, as the cut side is prone to bacterial infection.
I would probably recommend using it within 24 hours, though. Maybe add it to a salad at dinner?
Personally, I just eat the rest of the tomato along with the rest of my lunch sandwich.
Source: Fine Cooking Among others. There was a good deal of consensus on this issue.