Spoon the crumble over the rhubarb and apple filling, then sprinkle over the hazelnuts.

It has a sweet pastry crust with a stewed apple filling and the meringue topping makes it look more like a lemon meringue pie.

For the spiced apple filling ?

Spread the cooled apple filling right to the edge.

It can be made with a variety of fillings; the most common ones are either a savoury meat filling or a sweet apple filling.