So, first boil the potatoes until tender (don't forget salt). And make mashed potatoes adding butter and milk. As usually you do. The mass has a homogeneous and thick, with no lumps. You can add the sauce a little black pepper, but it is optional. After add to the grated cheese and chopped greens. Greens do not regret, it a little should not be. All mix well.

Waffle take the cake (mine was square), put it on a kitchen towel (so it is more convenient to fold em roll). And apply the puree on top of them (I puree enough to spread 4 Korzh).

If you have a round cakes, so there is no options. Put, put and turned the loaf. But I have them square, so there are two options. First: take the sausages (boil them before) and put them on the edge of the cake. To wait until wafer crust will be a little softer (it's not for long, because mashed potatoes hot, and easy to check: just start to turn if the cake doesn't break, all right). After we turn the cake roll.

Second: put the sausage, as I have in the photo, i.e. with two edges, and roll towards each other. Just get to the middle of the cake. The cake layer between two rolls cut in half.

The difference in these options is not special. Just do the rolls will be respectively thicker and thinner. Here the photo shows. And below too.

Before serving, cut into pieces. Can be served with ketchup and mayonnaise (or sour cream). In this photo cut into thin rolls (those that are folded to each other).

Just like that, without anything (in this photo, the roll thicker).

Delicious pieces of salty fish.