Peel the apple, cut into pieces, drizzle with a little lemon juice and place in a tin with the currants. Mix the flour, oat flakes, sugar and cold butter with the dough hook of the mixer, if necessary rework with your hands. Put crumbs of dough over the fruit and bake at 200 ° C for about 20-30 minutes
Sprinkle with sultanas, chopped nuts or cinnamon as desired. It tastes best with vanilla or chocolate ice cream or vanilla sauce.