Vegetarian oyakodon

Went through fridge today to see what'll have gone off by the time I get back from Christmas and New Year holiday. It turned out pretty much everything would keep apart from a pint of milk (most of which can go onto breakfast cereal or into tea for Dad tomorrow, and the rest can be poured away) and a box of Cauldron garlic-and-ginger-marinated tofu pieces.

I'd been meaning to try making a vegetarian form of Oyakodon, so finally got on with it and had a go. Notes I took while cooking are here at the request of bambooaxe on IRC. :)

( Notes are here - not quite recipe form, since I jotted most of this down on the back of an envelope as I was cooking. :) )