Julia was very understanding, and she knew that everyone has busy lives. But she regularly pointed out that it doesn't actually take that much extra time to cook a great meal, and the effort is well worth it. So while she would understand, she would also gently suggest that if you can't take the time to be good enough to yourself to make a good meal, perhaps you should re-examine your priorities.
So I'll echo Andy's response: Where are the cooking stories? Remember that the criteria is something that is challenging *to you*, so if you normally only cook Krafft Dinners, perhaps you could step up to *real* Mac and Cheese, or a mixed pasta. I'm willing to give suggestions, and with proper bribery I might be willing to share my mother's brilliant and inspiring homemade Mac and Cheese recipe. Let's make Julia proud, yes?