Cut butter into flour with a pastry blender until crumbly. Stir in cottage cheese until blended. Divide dough into thirds; wrap each portion separately in plastic wrap, and chill 2 hours.
Roll each portion into a 10-inch circle on a well-floured surface (dough will be sticky). Brush with melted butter; sprinkle each circle evenly with 1/2 cup brown sugar, and top with 1/3 cup pecans. Lightly press sugar and pecans into dough with a rolling pin.
Cut each circle into quarters. Cut each quarter into 4 wedges, and roll up, starting with long end; place, point side down, on ungreased baking sheets.
Bake at 350° for 30 minutes or until lightly browned. Remove immediately to wire racks to cool.