Dh was out from very early evening so thought I’d give it an experimental try.
Boiled potatoes (4-5 medium) mashed and pressed into the base of a lined, 9” loose bottom cake tin. (I didn’t have anything else suitable.)
A layer of veg (onion, one leek*, mushrooms, all chopped and fried in a little oil, some spinach (I used frozen, thawed and well squeezed) S&P (I didn’t use enough), all layered over the potato.
Then 4 eggs and half a cup (standard mug) of milk, whisked with S&P, half a cup of grated cheese added, all poured over the veg, more cheese on top, baked at 180 fan for half an hour.
The only loose leek I could find in Sainsbury’s the other day was huge, so IMO I used too much leek - another time would use rather more mushrooms.
Anyway, it was largely successful, and when dh came home at well past 11 he had two helpings and pronounced it delicious!