To make dough: Sift flour & salt into a large bowl: Add shortening and mix with electric mixer on medium speed for 2 minutes (the mixture should look like a coarse meal).
Add sour cream and stir: Add i/2 of water at a time, stirring until the dough forms a ball.
Divide dough into 24 small balls and place on plate, cover with plastic wrap and refrigerate 15 minutes.
Heat oven to 425°F and spray 2 large baking sheets with cooking spray; set aside.
To make filling: Combine WELL DRAINED pineapple, sugar or Splenda, coconut, and vanilla in bowl; set aside.
Using the 3 T flour as needed, roll each dough ball into a 6-inch circle.
Place 2 T filling in the center of each dough round:Roll& pinch edges of dough together to seal: place on baking sheet.
Pierce empanadas with a fork and brush tops with sweetened condensed milk.