Have you got a glass of pickled beets lurking in the back of your fridge? If yes, then you could use them for making this colourful and lovely quiche. The otherwise sweet beets have quite a piquant flavour when pickled, and that works well with the saltiness of the blue cheese. I used Valio AURA, one of my favourite blue cheese (made in Finland), but it will work with any other crumbly blue cheese