In a large bowl, combine flour, sugar, baking powder and salt. In a small bowl, lightly beat eggs; add milk, butter and lemon peel. Pour into dry ingredients and stir just until moistened. Spoon half of the batter into dozen greased or paper-lined muffin cups. Make a well in the center of each; add jam. Spoon remaining batter over jam. Bake at 200ºC or 20-25 minutes or until golden.
Yields: 1 dozen