In blender or food processor, combine eggs, flour, milk, sugar, vanilla and salt; blend until smooth. Let batter rest while oven preheats to 425 degrees F. Place butter in heavy, ovenproof skillet; place in hot oven 1-2 minutes to melt (do not burn). Swirl butter to coat pan; pour in batter. Bake 18-20 minutes, until pancake is puffy and deeply golden. Cool 5 minutes, then liberally dust with confectioners' sugar. Cut into 4 wedges and serve with fresh fruit. Refrigerate any leftovers.