In a large bowl, combine the flour, sugar, baking powder and salt. In another bowl, whisk the egg, buttermilk and butter. Stir into the dry ingredients just until moistened.
Pour batter by 1/3 cupfuls onto a greased hot griddle. Turn when bubbles form on top of pancakes; cook until second side is golden brown.
Meanwhile, in a small bowl, beat the cream cheese, confectioners' sugar and vanilla until smooth. Spread down the center of each pancake; top with strawberries. Fold pancake over filling.