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If I cut the onions and vegetables in the morning, they dry up till evening. Is there a taste change when you eat cooked vegetables, which dried out over 8 hours (before cooking)?

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Since it sounded unlikely that you were dehydrating thevegetables (to my ears anyway), I edited to reflect drying out over the course of the day; feel free to hit roll-back if that is not what you were talking about. –  mfg May 18 '11 at 14:23

3 Answers 3

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I don't think the water change will be very significant. If you were to lay them out flat so the surfaces dried a bit, they might sear and brown more easily (because that effect depends on moisture reduction in the first millimeter or so of the vegetable so that it can go above 212 F). The other thing that can be a factor is that once a vegetable is cut, some enzymes are released from the cells that can cause changes. Whether that effect will make any substantial difference depends a lot on which vegetables you are talking about.

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Thanks, if I put those vegetables in water will that help? Or water is not helpful for some certain type of veggies? –  TheIndependentAquarius Jun 20 '11 at 3:09
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Some vegetables do quite well stored in water after cutting. It reduces oxidation and drying out, but it can also cause flavor and vitamins to leach out, so it is a bit of a mixed bag. –  Michael at Herbivoracious Jun 21 '11 at 17:53
    
I'll use that water in cooking, so vitamins loss is not a problem. I want to try it with spanich. –  TheIndependentAquarius Jun 22 '11 at 3:44

8 hours in still air is probably not going to be enough to thoroughly dry your vegetables. If you live in a very dry climate and the veggies were sitting uncovered in front of a fan the entire time then you might have actually dried them.

So your title is asking a different question than your description.

Description: If you live in a very humid climate then you might be more concerned about spoiling than drying. They may have become a little limp so it makes a difference how you plan to cook them. If the veggies are going to be diced and sauteed and used in something else then they will probably be fine. If they are going to be their own side- like steamed asparagus- then the texture may be decidedly un-fresh.

Either way- the flavor will be normal or close to it.

Title: Actual dehydrated veggies are different altogether. They have had most of their water removed. This concentrates flavors and changes them. They are sweeter and more intense. Their texture is also firmer and ranges from crisp to rubbery to almost normal depending on how much they are rehydrated.

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Thanks for the info. –  TheIndependentAquarius Jun 20 '11 at 3:08

If you're eating them raw, or if they tend to oxidize (like avocado, for example) then yes, you may notice a difference.

Otherwise, you're just losing a bit of water. No big deal.

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Thanks, like potatoes get oxidized? –  TheIndependentAquarius Jun 20 '11 at 3:10
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@anisha: Yea, when they turn brown? If you were cutting up potatoes, I'd definitely tell you to put 'em in water. Avocado, I'd just tell you not to cut up (lemon juice works, but it changes the taste, obviously). Onions and peppers would be fine. –  Satanicpuppy Jun 20 '11 at 17:25
    
@I know about potatoes, but should I put the lady fingers too in the water for keeping them fresh? –  TheIndependentAquarius Jun 21 '11 at 1:02

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