Don't throw away lettuce, greens, celery, etc that has been in your refrigerator a little too long and gone limp. Revive most leafy vegetables by cutting a small amount from the stem-end, soaking in warm (100 degree) water for 5 minutes, drain and refrige
Originating in the Mediterranean basin, collards were a favorite food of the ancient Greeks and Romans.
Collard Greens are used widely in the cuisine of the Southern USA.