You can do this one of two ways. First, go ahead a few days and add the ingredients in your food log. Once that's done, take the nutrition info it pulls up for your "day" and make a custom food for it.
Alternatively, you can go to another site (Google "recipe calculator") and build the recipe there, then make a custom food in FitDay with the resulting nutrition info.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days