I have two suggestions: homemade pre-made, and why not both.
You can pre-make things like pancake mix, taco seasoning, pasta sauce seasoning, etc. write any instructions on the ziplock bag or container.
Instant items from a box or bag can usually be dressed up with fresh foods. If she’s cooking then offer to prep fresh items.
Also, respect that some people simple have no patience for cooking and don’t want to learn any. Communicate with each other to understand how to make it work.
From the safety of my bunker.