In a small bowl, beat the eggs, milk, sugar and salt. Add flour; beat until smooth. In a deep-fat fryer or electric skillet, heat 2-1/2 in. of oil to 375°. Place rosette iron in hot oil for 30 seconds. Blot iron on paper towels, then dip iron in batter to three-fourths the way up the sides (do not let batter run over top of iron). Immediately place in hot oil; loosen rosette with fork and remove iron. Fry for 1-2 minutes on each side or until golden brown. Remove to a wire rack covered with paper towels. Repeat with remaining batter. Sprinkle with confectioners' sugar before serving. Yield: about 2-1/2 dozen.