Ok, I have to admit that I made this cake a while ago and I got the recipe from somewhere on the inter-net. Guess what? I haven't got the slightest idea where I have found it and I cannot find it now.
Well, so I will only roughly tell you what the cake is made of.
First, you have to make a shell out of one egg, flour, butter and a bit sugar. Mix the ingredients and press the dough into a greased and floured 26cm baking tin. Put it into the fridge while preparing the filling.
For the filling, skin 1 kg of rhubarb (mine was red on the outside and rather greenish on the inside, but there are several sorts...) and cut it into ca. 1cm slices.
Then, take one sachet of vanilla custard powder and mix the powder with some sugar (cf. sachet) and about 100ml milk. Meanwhile, cook about 300ml milk. In total it is only 400ml instead of 500, but so it should get a bit more firm. I think, I added a bit more sugar because the rhubarb was not too sweet, but again, this depends on the sort of rhubarb you use.
Stir the mixture into the hot milk. Go on stirring until the mass becomes thick. Then, fold under the rhubarb pieces.
Put everything into the shell in the tin and bake the cake at 175°C for... well that is a good question... I think it was about an hour, but better try less and check every now and then whether it is done ;)
Well, I hope my explanation is not too much of a mess and you'll have fun with it :)
