A sprout screen is a great investment (but still inexpensive) you can make for your kitchen.
Generally, I sprout beans for around 3 to 5 days.
Take well-drained and rinsed bean sprouts and store them in the refrigerator in Anchor Hocking large glass storage dishes. (I love these storage dishes!)
How do I use the sprouts? Well, mostly in salads. You can also sprout other beans, such as kidney beans or pinto beans. Add them raw to salads or in soups. See Four (4) Yummy Ways to Use Sprouted Beans for more information and ideas.
We don't prefer older mung bean sprouts because we find them more bitter when older, unless cooked (and we prefer to eat these sprouted beans raw in salads). We like to eat them when leaves are just beginning to appear, colored in yellow-purple.
We like them when the first leaves have just appeared and are green. They get green just from filtered light coming through the kitchen window.
I prefer the tails to be about 1/4-inch.