Sift flour and icing sugar into bowl, rub in butter. Add egg yolk and enough water to mix to a firm dough; turn onto lightly floured surface, knead lightly until smooth, cover, refrigerate 30 mins. Roll out on lightly floured surface large enough to line a 23cm flan tin. Spread pastry with filling, bake in moderately hot oven 10 mins, reduce heat to moderate, bake further 20 mins or until golden brown, cook to room temperature. Brush flan with half the apple jelly, top with strawberries, brush with remaining apple jelly.