This recipe can be easily doubled. If you double the recipe, be sure to place the stems on the baking sheet so that the tips are pointed toward the center, and the bottoms are pointed out, toward the edges of the pan. Since the tips are thinner than the stems, they tend to cook faster. However, when roasting, items at the edges of the pan cooked more quickly than those in the center. Taking the time to lace them this way helps the asparagus cook evenly.