1 package active dry yeast
1-1/2 teaspoons granulated sugar
1/4 cup warm milk (105F to 115F)
1 cup butter
2 cups all-purpose flour
1/2 cup dairy sour cream
3 egg yolks
2/3 cup apricot or apple spreadable fruit
1/2 cup finely chopped pecans
1 teaspoon water
Coarse sugar (optional)
In a small bowl, dissolve the yeast and granulated sugar in the warm milk. In a large bowl, using a pastry blender, cut butter into flour until crumbly; stir in yeast mixture, sour cream, and 2 of the egg yolks. With floured hands, knead until combined. Divide mixture in half.
On a floured surface, roll each half of the dough into a 12-inch square. Fold each square in thirds; wrap in plastic wrap. Chill in the refrigerator at least 8 hours or up to 24 hours.
For filling, in a small bowl, stir together spreadable fruit and pecans; set aside.
On a floured surface, roll each dough portion into a 15x10-inch rectangle. Cut the dough into 2-1/2-inch squares (48 total). Place a slightly rounded 1/2 teaspoonful of the filling in the center of each square. Fold each square in half diagonally to form a triangle. Seal edges with tines of a fork. Transfer to ungreased baking sheets.
In a small bowl, combine remaining egg yolk and the water; brush over tops of pastries. If desired, sprinkle with coarse sugar. Bake in a 350F oven about 15 minutes or until golden. Transfer to wire racks. Serve warm, or cool to room temperature