Beat butter in a blender until fluffy. Not stopping to whisk, one by one add the eggs. Whisk until smooth. Pour the mixture into a wide bowl, add the sifted with the baking powder and the flour, sour cream and a little salt. Quickly knead the dough, tighten foil and send in the fridge for 1 hour. It took me a little bit more flour, approximately 50-70 g...

Beet tops, rinse in running water. Tops good shake, spread out on a clean towel and dry. Cut off the stalks (we don't need them), and the leaves are very coarsely chop. Cheese to grate on a coarse grater. To connect beet tops with cheese and stir.

Divide the dough into 2 parts. Roll out two layers thickness 0,5 cm. One Korzh put in the form, make nakoly with a fork. The center put the filling slide.

Cover with the second cake, combine the edges. On the top cake to make shaped cut-outs. Grease top with sour cream and bake at T 180 degrees for 40-45 minutes.