Disqus allows people with yahoo accounts to comment fairly seamlessly. This is good for Yahoo accounts, but it's bad for this blog. Over the past couple weeks, some of the least helpful comments have come from people using Yahoo. My sense is that Yahoo is so ubiquitous that it actually undermines the point of even bothering to register.
Cooking for yourself is one of the surest ways to eat well. Bestselling author Mark Bittman teaches James Hamblin the recipe that everyone is Googling.