In a blender, combine the eggs, milk, flour and salt; cover and process until smooth.
Pour the butter into an ungreased 13-in. x 9-in. baking dish; add the batter. Bake, uncovered, at 400° for 20 minutes.
Meanwhile, in a small saucepan, combine the first five syrup ingredients; bring to a boil. Boil for 7 minutes. Remove from the heat; stir in vanilla. Dust pancake with confectioners' sugar; serve immediately with the syrup. Yield: 8 servings (about 2 cups syrup).