I wish I could show the whole thing in full size here but I fear I will be violating some sort of copyright if I do that. But do check out this flowchart graphic (a taste of which - pun intended - is above) from the Information is Beautiful website. British infographic artist David McCandless combs the recipes at Epicurious.com and 1000 Recipes on BBC Food to find the most common ingredients that go with main ingredients in recipes. He calls this his "infoodgraphic". It covers meat and vegetarian offerings, too. Plus it's just a fascinating piece of work.
You can also buy a hi-res version of his graphic at his online store for $7.50. (H/T Andrew Sullivan at The Daily Beast)