Classic leafy greens like lettuce, celery and romaine lettuce are great in salads and can easily be regrown at home using the leftover stump and water. To grow iceberg lettuce, save the end and put it into a container with enough water to cover at least half of it. Make sure you place it on the window sill or in a spot where it can get enough natural light to grow.
Other than changing the water every few days, you can sit back and watch the miracle of life unfold. After just a couple of days, you should see the roots sprouting. Within two weeks you’ll be ready to snack on some fresh leaves. For bigger lettuce heads, transfer the end into soil after a week or two.