How to Blanch Vegetables
Cook vegetables briefly in boiling water and then plunge into ice water to cool; drain.
To store asparagus, stand fresh spears upright in a container filled with about 1 inch of water. Cover loosely with a plastic bag and refrigerate. Or, store in refrigerator with a damp paper towel wrapped around base of stalks and cover loosely with a plastic bag. Asparagus is best when cooked the day it is purchased, but will keep up to 3 or 4 days. Wash just before using.