Take a large bowl, cut butter into flour as for pie dough.Add cottage cheese, mixing lightly until dough is well combined and holds together.Divide dough into two equal portions and wrap in plastic. Refrigerate for several hours or overnight.
When ready to bake, heat oven to 375 F.
On lightly floured board, roll out one portion of dough to 1/8-inch thickness.
With a pizza cutter, cut dough into 2 1/2-inch squares. Place on an ungreased cookie sheet, spacing 1-inch apart.
Dollop a teaspoon of filling on top and bring two opposite corners to the middle and either pinch them together or overlap them. If it appears they aren'tsticking together, brush one end lightly with egg white and stick the other on top of it.Bake for 20 minutes at 200c or until lightly browned.sprinkle some sugar on the top.
