In a large bowl, use a pastry cutter to cut the butter into the flour. Combine until you have a crumbly consistency.
Add cottage cheese, mixing lightly until dough is well combined and holds together.
Divide dough into four equal portions and wrap in plastic. Refrigerate for several hours or overnight.
Preheat oven to 375 degrees.
On lightly floured board, roll out one portion of dough to 1/8-inch thickness.
With a pizza cutter or pastry dough cutter, cut dough into 2 1/2-inch squares.
Place a teaspoon of preserves in the center of each square.
Bring all four corners together and press down in the center to seal and make a packet.
Place a generous pinch of sugar in the center of each cookie.
Place cookies 1 inch apart on an un-greased cookie sheet.
Bake for 20 minutes or until lightly golden browned.
Remove from pan with a metal spatula and cool completely on a wire rack.