In a large bowl, combine flour, salt, and sugar. Add butter and mix until crumbly. Gradually add ice water until dough forms.
Roll out dough on a floured surface. Cut into rectangles. Place a spoonful of jam on half of the rectangles. Top with remaining rectangles and seal edges with a fork.
Place tarts on a baking sheet lined with parchment paper. Bake for 25 minutes or until golden brown.
In a small bowl, mix powdered sugar, milk, and vanilla extract to make the glaze. Drizzle over cooled tarts.