at Five Mushrooms searches several sites at once.
When you’re looking for a recipe with certain ingredients or by a particular chef, hit up Five Mushrooms, a multi-recipe site search engine which includes results from Allrecipes.com, the Food Network, Yahoo! Food, Cooking.com and Epicurious among others. Search by ingredients—like carrot celery onion—or specific quantities, like 1 egg, or by chef and ingredient, like emeril beef. You can even use advanced operators like the minus sign to exclude results (i.e., cookies -“chocolate chip”).
For instance, I searched on Swiss chard and got some great ideas.