Hi there, hoping I can help with your question about attribution. Usually when a recipe is altered from the original a simple "Adapted from" followed by the recipe and name of the creator will suffice. Hope that helps!
I doubt that every recipe here is original. It would be great if they all were. One feature I want to add soon is for other cooks to make changes to existing recipes and have all the variations displayed. Is that sort of what you were thinking?
Congratulations! Just featured your recipe on Twitter (look for me as plhawkins247). We will be doing that with members on a daily basis! Do you twitter?