scheiterhaufen - heap of logs

I've had guests for Easter where I served an Austrian speciality, plain-and-simple Scheiterhaufen, which nevertheless was such a success that I feel obligated to publish the recipy which I got from my dear niece Silvia.

So here it is, the recipe:
Scheiterhaufen - (literally:) Heap of Logs:
(In Austria the cooking measure is dekagram rather than gram, to which I'll stick here for authenticity. ;-)
Ingredients for cake mixture (4 helpings):
6 (old) buns, or old bread of any kind (white bread according to the original recipe, which of course also includes baguettes and the like, but you can try with black bread too)
3 eggs
3/8 litres milk
5 dekagrams sugar
Ingredients for the filling:
5 dekagrams margarine
7 dekagrams powdered sugar
2 eggs
1 pack vanilla sugar
juice of 1 lemon
25 dekagrams = 1 pack (Austrian measures) of curd cheese (= cottage cheese = farmer's cheese = quark)
5 dekagrams raisins
Preparation:
Cut the buns in handsome pieces (about a centimetre thick). Brush your baking dish with some margarine, put one layer of bun pieces in it.
Mix the 3 eggs, 3/8 l milk and 5 dekagrams sugar = the cake mixture, and put some of it on the first layer of buns - but keep some for the next layer(s)!
Prepare filling: separate yolk from the 2 eggs and mix yolk and other filling ingredients; mix the egg white in a separate bowl till it is creamy and then mix with the rest of the filling mass.
Put a layer of filling on the layer of bun pieces - keep some of it if you intend to build several layers; if you only want 2 of them you put in all of it.
After that put a second layer of bun pieces on the filling, again pour some of the cake mixture on it - and keep some if you want to build a third layer.
You can build 3 layers of buns, or 5 if you like; I wouldn't recommend more than five though (I've built one with 3 layers on my Easter weekend). The upper layer should be buns, but you may also try with a filling layer as upper layer (I haven't).
Cooking:
With 200 ° Celsius in the oven, don't ask me which programme, I used the one with top and bottom heat plus cooking fan (so the whole programme), and it did work. Scent will tell when it is ready (but you also could check colour of the top layer of buns).
Serve it warm with powdered sugar (you can also leave out the sugar if it is sweet enough for your taste already).

Oh - and the photo is one Anacamptis morio; the first orchid of this year's season.