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The ramp, sometimes called wild leek, is a wild onion native to North America. Though the bulb resembles that of a scallion, the beautiful flat, broad leaves set it apart. The flavor and odor of ramps is usually compared to a combination of onions and garlic, and the garlic odor is particularly strong. Strong enough, in fact, that even ramp-lovers will advise caution. If you sit down to a big meal of ramps, don't be surprised if people continue to keep their distance after a few days have passed!  RECIPE and here is great cookbook with recipes for Ramps. It is called Ramps The Cookbook.

Cautions aside, ramps add wonderful and uniquely pungent flavor to soups, egg dishes, casseroles, rice dishes and potato dishes. Use them raw or cooked in any recipe calling for scallions or leeks, or cook them in a more traditional way, scrambled with eggs or fried with potatoes. Since ramps aren't cultivated in the way leeks are, they're much easier to clean. Just cut off roots, rinse thoroughly, and scrub off any excess dirt on the bulbs.

After cleaning (if needed) chop them up and use them. You do not need to defrost them.