Sometimes it is--chemicals can be added to prevent discoloration.
Lettuce is planted by farmers, harvested, processed before it is prepared in the restaurants in China.
Lettuce
Lettuce
The likely answer is watermelon. However, there are commercially available dried watermelon chips, and these can be made at home (although they may have limited shelf life). Pickled watermelon rind is also sold in some areas.
Lettuce retains quality and nutrition best if kept refrigerated. Minimally processed lettuce should be treated like any other potentially hazardous food and should be kept refrigerated.
Lettuce ! If you ever figured a way to preserve it, you'd make a lot of home gardeners VERY happy ! Lettuce will keep in a refrigerator for a while, but you cannot freeze or dehydrate it. I know of no process to store lettuce !
There are possibly several answers. The first one I can think of is Lettuce which I have never heard of being processed. Also what about Mustard Cress or Watercress?
lettuce Is only true for certain types. There are canned pickled lettuces.
Lettuce
Yes. Any minimally processed vegetable should be refrigerated.
The possessive form for the singular noun lettuce is lettuce's.
romaine lettuce is different because it is much fresher than reg lettuce.