We are not actively soliciting new recipes at the momemt, but will be glad to accept them if they come along.
The body of recipes is all saved in, and new recipes are normally written in, AsciiDoctor format. If that's not right for you, you can actually write in any input form that pandoc can convert from.
When you have the gist of the recipe done, or if you want advice before starting, please contact me.
Thanks for your interest.