Instructions

1. Whisk together flour and salt in a bowl until combined. Beat cream cheese and butter in a large bowl until pale and creamy (about 3 minutes in a stand mixer or 6 with a handheld).
2. Divide dough into four equal pieces and wrap each in plastic wrap. Chill until firm, about 1 1/2 hours.
3. Make filling while pastry chills. Bring apricots, raisins, honey, marmalade, cinnamon, and water to a boil in a heavy saucepan over moderate heat, stirring. Reduce heat and simmer, stirring, until dried fruit is softened and mixture is thick, about 10 minutes. Transfer to a bowl and cool until warm, about 20 minutes.
4. Transfer to a food processor and pulse until finely chopped. Chill until cold, about 2 hours.
5. Put oven rack in the middle position and preheat to 375° F. Line a large baking sheet with parchment.
6. Roll out 1 piece of dough (keep remaining pieces chilled), between 2 sheets of well floured wax paper with a rolling pin into roughly an 11 inch square (if dough gets too soft, transfer dough in wax paper to baking sheet and chill until firm). Discard top sheet of wax and trim dough with a pastry wheel or a sharp knife into a 10-inch square. Cut square into 4 equal strips, then cut crosswise in fourths again to form sixteen 2 1/2-inch squares.
7. Working quickly, place one heaping teaspoon filling in center of each square. Brush 2 opposite corners with egg wash, then bring corners together and pinch firmly to adhere. (If dough becomes too soft, freeze it on a baking sheet for a few minutes.)
8. Arrange cookies 2 inches apart on a baking sheet. Bake until golden, 17 to 20 minutes, then transfer with a metal spatula to racks to cool completely. Make more cookies with remaining dough and filling on a lined cool baking sheet. Dust cooled cookies with confectioners' sugar if desired.