Beet-and-Asparagus Salad with Roasted Garlic Dressing

In the spring, beets are often sold at farmers' markets with their greens still attached. For this hearty salad, Ted Allen roasts the beets with garlic to make a creamy vinaigrette, then wilts the beet greens to toss with the asparagus salad. If you can't find beet greens, Swiss chard is an …