Go Swedish with Pickled Herrings, Köttbullar and Äggkaka

I'm having my Swedish days right now. I started by buying some Daim chocolate. Right now I am well stocked on it. I only need to be careful not too start eating from it in a non-self-controlled manner. So far things are working well.
In fact, I didn't just go and buy chocolate. Right while I was writing down the Bloggers Around the World post for Sweden, I knew what I was going to cook and, of course, bought things for that, too.
Somehow I had a travel brochure from 2011 about Sweden in my possession. Today I have no idea, how I came to have it. Blank, no idea at all. Anyway, there was a picture of Äggkaka in it and I thought ... I am going to have it ... whatever it is. What is it then?