Teenagers cooking meals

I have two teenage boys, twins actually, age 14. Over the summer they have
been responsible for cooking dinner for their siblings one a week (each).
Unfortunately this experience has turned into a "how little can I do"
exercise. I am looking for suggestions about how to get them to be more
involved and responsble for some aspects of family life. In terms of
cooking, I have considered asking them to run the "menu" by me over the
weekend, before they cook. But then it becomes more my responsiblity.

Thanks for any suggestions.

Dave