Dandelions are the enemy in the war for the pristine green lawn. However, they are incredibly beneficial to many insects and pollinators, and there are a variety of ways to cook and eat them.
Ode To The Dandelion
University of Maryland Medical Center - Dandelion
National Gardening Association - Fall Garden Cover Crops
Large populations of dandelions can actually offer such a strong floral cue to pollinators that the forego visiting a majority of other plants on the landscape. This can be especially damaging to rare plant species or those that cannot self pollinate.