This is fun hearing how people forage for food in their yards! I have been enjoying morel mushrooms from my woods, young dandelion greens, wild garlic (which many people think is wild onion), and wood sorrel. The greens are chocked full of Vitamin C and minerals. I'm sure the wild garlic is full of nutrients, I just haven't bothered to look it up for nutrition information. I've enjoyed these foods to supplement my diet while I wait for my garden greens to take off and supply me with enough for summer.
I would like to learn more about foraging for mushrooms. Morels are real easy to identify. They are great for the beginner but I know there're other edible mushrooms out there!