I cooked the aforementioned chicken dish this evening, my first cooking unsupervised by M in quite some time. Housemate T needed to intervene a few times (for instance to point out that you don't cook all of a leek, you cut off the top part) but in general it proceeded without disaster and was even quite good. I should have seasoned it a bit more, but I have not -- so far -- died.
I can do this cooking thing. It's only taken two years of weekly practising. I should try and graduate to cooking twice a week, I feel.