In a bowl combine 1 cup flour, 1/3 cup brown sugar, baking poowder, cinnamon, salt and currants.
Thinly slice one half of one of the apples; set aside.
Chop remaining apples and add to flour mixture along with milk and melted butter; mix well.
Spread in buttered nine inch square metal cake pan.
Arrange slices on top.
Sauce: In a bowl, whisk together water, brown sugar, flour, butter and vanilla; gently pour over batter.
Bake in 350f degree oven for 30/40 minutes or until tester inserted in cakes comes out clean.
Serve warm.
