Website that disects home cooked meals??

Does anyone know of a website that you can enter the contents of a food dish and it will tell you the nutritional value and servings etc? I was just thinking it woudl be great to have expecially since the healthier foods are home made rather than pre-packaged.
IE: If I made banana bread at home, I could enter the differnt ingrediants and the amounts that were used to make the bread, and it would tell me the calories etc..

Right now, I have to guess or I enter each individual ingrediate into my food diary seperatly...this can get a little out of hand!
Thanks!