Cucumbers (Cucumis
sativus) are cylindrical in shape and commonly range in length from about 6
to 9 inches, although they can be smaller or much larger. Their skin ranges in color from green
to white and may be either smooth or ridged, depending upon the variety. Inside
a cucumber is a very pale green flesh that is dense yet aqueous and crunchy at
the same time, as well as numerous edible fleshy seeds. The seedless,
thin-skinned, and longer varieties are most often grown in greenhouses.
More than
70 percent of the U.S. cucumber crop is used to make pickles. Cucumbers that
are cultivated to make pickles are usually of the smaller varieties. For
example, gherkins are one popular variety of cucumbers cultivated for this
purpose.
HISTORY
The cucumber is a tropical
plant that originated in Southeast Asia more than 10,000 years ago. Early
explorers and travelers from India and other parts of Asia brought it back with
them, and its popularity spread to the ancient civilizations of Egypt, Greece,
and Rome. During ancient times, it was used not only as a food, but also for
its beneficial skin-healing properties. During the seventeenth century,
greenhouse cultivation of cucumbers was developed. Cucumbers were introduced to
the United States by the early colonists.
The pickling process of
cucumbers is thought to have originated in Spain, as pickles were said to be
valued by Roman emperors.
NUTRITIONAL HIGHLIGHTS
Fresh cucumbers are
composed primarily of water but still pack a lot of nutritional value. The flesh
of cucumbers is a very good source of vitamins C and A and folic acid. The hard
skin is rich in fiber and contains a variety of important minerals, including
silica, potassium, magnesium, and molybdenum. A 3½-ounce (100 gram) serving of
cucumber provides only 12 calories as carbohydrate.
HEALTH BENEFITS
Cucumber is an excellent
source of silica, a trace mineral that contributes to the strength of our
connective tissue. Connective tissue is what holds our body together. It
includes the intracellular cement, muscles, tendons, ligaments, cartilage, and
bone. Without silica, connective tissue would not be properly constructed,
leaving it impaired. Cucumber is often recommended as a source of
silica.
Cucumbers are also used
topically for various types of skin problems, including swelling under the eyes
and sunburn. Two compounds in cucumbers, ascorbic acid and caffeic acid,
prevent water retention, which may explain why cucumbers applied topically are
often helpful for swollen eyes, burns, and dermatitis.
HOW TO SELECT AND STORE
Cucumbers should be
fresh-looking, well shaped, and medium to dark green in color. Avoid cucumbers
that are yellow or puffy, have sunken, water-soaked areas, or are wrinkled at
their tips. Thinner cucumbers will generally have fewer seeds than those that
are thicker.
Store cucumbers in the
refrigerator, where they will keep for several days. If you do not use an
entire cucumber during one meal, wrap the remainder tightly in plastic or place
it in a sealed container to retain its freshness, but even then it should be
used within one to two days. Cucumbers should not be left out at room
temperature for too long, as this will cause them to wilt and become limp.
TIPS FOR PREPARING
Wash cucumbers under cold
running water and gently scrub them with a vegetable brush. If waxed or not
organically grown, the cucumber should also be peeled. Cucumbers can be sliced,
diced, or cut into sticks. While the seeds are edible and nutritious, some
people prefer not to eat them. To remove them easily, cut the cucumber
lengthwise and use the tip of a spoon to gently scoop them out.
QUICK SERVING IDEAS
Mix 1 cup
diced cucumbers with 1 cup sugar snap peas and ½ cup chopped mint leaves, and
toss with a rice wine vinaigrette.
For a quick and easy cold gazpacho
soup, simply purée 1 peeled cucumber, 1 cup fresh tomatoes, 1 green pepper, and
½ red onion, then add salt and pepper to taste.
To make a cucumber compote:
Sauté cubed cucumbers with dill in a little vegetable stock for a few minutes;
remove from heat; chill; and then top with a dollop of plain yogurt and a sprig
of dill or parsley before serving.
Make
cucumber tempura by dredging cucumber slices in a beaten egg and then in
whole-wheat flour. Bake on a cookie sheet at 300 degrees F. until crispy and
serve with a dipping sauce or dressing of your choice.
Since cucumbers are among
the foods on which pesticide residues have been most frequently found, we
recommend choosing cucumbers that have been organically grown. In addition,
cucumbers are often waxed to protect them from bruising during shipping.
Plant-, insect-, animal-, or petroleum-based waxes may be used. Since you may
not be able to determine the source of these waxes, again, we recommend
choosing organically grown cucumbers.
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