Willy Galloway is the author of Grow Cook Eat. She says that one of the greatest parts of growing your own food is discovering all the "bonus edibles" in your garden like herb flowers, radish leaves and garlic scapes.
She makes a garlic scape pesto with her garlic scapes and tartines with Gruyere and radish greens with the tops from her radishes. Both recipes are on the Good Food blog.
Garlic scapes
Kale flowers
Tartines