Asparagus Risotto with Asparagus Ribbons and Lemon Zest

This is another example of using a main ingredient in creative ways to add powerful flavor to your risotto. Here we use an asparagus-vegetable stock, as well as—if you want to go the extra mile—an asparagus broth from the pureed stalks, to enrich your risotto. (The broth technique is worth doing on its own as an asparagus sauce or soup.) Asparagus is an elegantly flavored vegetable, but you lose a lot of that flavor if you discard their woody stalks. This dish tries to wring all possible fl